#include <bits/stdc++.h>

using namespace std;

int main() {
	int n;
	scanf("%d", &n);
	vector<int> a(n);
	long long sum = 0;
	for (int & x : a) {
		scanf("%d", &x);
		sum += x;
	}
	if (sum != 0) {
		puts("YES");
		puts("1");
		printf("%d %d\n", 1, n);
		exit(0);
	}
	sum = 0;
	for (int i = 0; i < n; i++) {
		sum += a[i];
		if (sum != 0) {
			puts("YES");
			puts("2");
			printf("%d %d\n", 1, i + 1);
			printf("%d %d\n", i + 2, n);
			exit(0);
		}
	}
	puts("NO");
}

#include <bits/stdc++.h>

using namespace std;

int main() {
	char str[4][4 + 1];
	// cells are '.', 'o', 'x'
	for (int i = 0; i < 4; i++) {
		cin >> str[i];
	}

	auto check = [&]() {
		for (int i = 0; i < 4; i++) {
			for (int j = 0; j < 4; j++) {
				for (int dx = -1; dx <= 1; dx++) {
					for (int dy = -1; dy <= 1; dy++) {
						if (dx == 0 && dy == 0) continue;
						if (i + dx * 3 > 4 || j + dy * 3 > 4 || i + dx * 3 < -1 || j + dy * 3 < -1) continue;
						bool ok = true;
						for (int p = 0; p < 3; p++) {
							ok &= str[i + p * dx][j + p * dy] == 'x';
						}
						if (ok) return true;
					}
				}
			}
		}
		return false;
	};

	for (int i = 0; i < 4; i++) {
		for (int j = 0; j < 4; j++) {
			if (str[i][j] == '.') {
				str[i][j] = 'x';
				if (check()) {
					puts("YES");
					exit(0);
				}
				str[i][j] = '.';
			}
		}
	}
	puts("NO");
}

#include <bits/stdc++.h>

using namespace std;

#define all(x) (x).begin(), (x).end()

void solve() {
	int n;
	cin >> n;
	vector<string> names(n);
	for (string& name : names) {
		cin >> name;
	}
	sort(all(names));

	auto getIdx = [&](const string& s) {
		int pos = lower_bound(all(names), s) - names.begin();
		if (pos == (int)names.size() || names[pos] != s) return -1;
		return pos;
	};

	auto splitIntoUserMessage = [](const string& s) {
		size_t pos = s.find(':');
		assert(pos != string::npos);
		return make_pair(s.substr(0, pos), s.substr(pos + 1));
	};

	auto splitIntoTokensOfLatinLetters = [](const string& s) {
		vector<string> result;
		string token;
		for (char c : s) {
			if (isalpha(c) || isdigit(c)) {
				token += c;
			}
			else {
				if (!token.empty()) {
					result.push_back(token);
				}
				token.clear();
			}
		}
		if (!token.empty()) {
			result.push_back(token);
		}
		return result;
	};

	int m;
	cin >> m;
	vector<int> who(m);
	vector<vector<char>> can(m, vector<char>(n, true));

	vector<string> messages(m);

	string tmp;
	getline(cin, tmp);

	for (int i = 0; i < m; i++) {
		string cur;
		getline(cin, cur);
		pair<string, string> p = splitIntoUserMessage(cur);
		const string& user = p.first;
		const string& message = p.second;
		who[i] = getIdx(user);
		if (who[i] != -1) {
			fill(all(can[i]), false);
			can[i][who[i]] = true;
		}
		messages[i] = message;
		vector<string> tokens = splitIntoTokensOfLatinLetters(message);
		for (const string& z : tokens) {
			int idx = getIdx(z);
			if (idx != -1) {
				can[i][idx] = false;
			}
		}
	}

	vector<vector<int>> par(m, vector<int>(n, -1));
	for (int i = 0; i < n; i++) {
		if (can[0][i]) par[0][i] = 0;
	}
	for (int msg = 0; msg + 1 < m; msg++) {
		for (int i = 0; i < n; i++) {
			if (par[msg][i] == -1) continue;
			for (int j = 0; j < n; j++) {
				if (i == j) continue;
				if (can[msg + 1][j]) {
					par[msg + 1][j] = i;
				}
			}
		}
	}
	int msg = m - 1, pos = -1;
	for (int i = 0; i < n; i++) {
		if (par[msg][i] != -1) {
			pos = i;
			break;
		}
	}
	if (pos == -1) {
		cout << "Impossible\n";
		return;
	}
	while (msg >= 0) {
		who[msg] = pos;
		pos = par[msg][pos];
		msg--;
	}
	for (int i = 0; i < m; i++) {
		cout << names[who[i]] << ":" << messages[i] << "\n";
	}
	return;
}

int main() {
	//freopen("input.txt", "r", stdin);
	int t;
	cin >> t; // number of tests

	while (t--) {
		solve();
	}
}

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int nextInt() {
	int x = 0, p = 1;
	char c;
	do {
		c = getchar();
	} while (c <= 32);
	if (c == '-') {
		p = -1;
		c = getchar();
	}
	while (c >= '0' && c <= '9') {
		x = x * 10 + c - '0';
		c = getchar();
	}
	return x * p;
}

#define all(x) (x).begin(), (x).end()

const int N = (int)3e5 + 5;
const int MAX_VAL = (int)1e9;

int n;
ll l[N], r[N];

struct event {
	ll x;
	int c;
	event() {}
	event(ll x, int c) : x(x), c(c) {}
};

pair<ll, int> check(ll len) {
	if (len == 0) return make_pair(0LL, n);
	static vector<event> evs;
	evs.resize(0);
	for (int i = 1; i <= n; i++) {
		if (r[i] - len > l[i]) {
			evs.push_back(event(l[i], 1));
			evs.push_back(event(r[i] - len, -1));
		}
	}
	sort(all(evs), [](const event & a, const event & b) { return a.x < b.x; });
	reverse(all(evs));
	int cnt = 0, maxiCnt = 0;
	ll bestPos = 0;
	while (evs.size() > 0) {
		ll x = evs.back().x;
		while (evs.size() > 0 && evs.back().x == x) {
			cnt += evs.back().c;
			evs.pop_back();
		}
		if (cnt > maxiCnt) {
			maxiCnt = cnt;
			bestPos = x;
		}
	}
	return make_pair(bestPos, maxiCnt);
}

vector<int> getAns(ll len) {
	if (len == 0) {
		vector<int> res(n);
		iota(all(res), 1);
		return res;
	}
	ll pos = check(len).first;
	vector<int> res;
	for (int i = 1; i <= n; i++) {
		if (pos >= l[i] && pos < r[i] - len) {
			res.push_back(i);
		}
	}
	return res;
}

int main() {
	n = nextInt();
	int k = nextInt();
	for (int i = 1; i <= n; i++) {
		l[i] = nextInt();
		r[i] = nextInt() + 2;
	}
	ll l = 0, r = MAX_VAL + MAX_VAL + 5;
	while (r - l > 1) {
		ll mid = (l + r) >> 1;
		if (check(mid).second >= k) l = mid;
		else r = mid;
	}

	vector<int> ans = getAns(l);

	cout << l << endl;
	assert((int)ans.size() >= k);
	ans.resize(k);
	for (int i : ans) {
		printf("%d ", i);
	}
	puts("");
}

#include <bits/stdc++.h>

using namespace std;

const int N = (int)404;
const int ALPHA = 26;

bitset<N> b[ALPHA][N];
char patt[N][N];
bitset<N> result[N];

bitset<N> getShifted(const bitset<N>& b, int len, int shift) {
	assert(0 <= shift && shift < len);
	return (b >> shift) | (b << (len - shift));
}

int main() {
#ifdef LOCAL
	freopen("input.txt", "r", stdin);
#endif
	int n, m, r, c;
	scanf("%d%d", &n, &m);

	for (int i = 0; i < n; i++) {
		static char str[N];
		scanf("%s", str);
		for (int j = 0; j < m; j++) {
			b[(int)(str[j] - 'a')][i][j] = true;
		}
	}
	
	scanf("%d%d", &r, &c);

	for (int i = 0; i < n; i++) {
		result[i] = ~result[i];
	}

	for (int i = 0; i < r; i++) {
		scanf("%s", patt[i]);
		for (int j = 0; j < c; j++) {
			if (patt[i][j] == '?') continue;
			int c = patt[i][j] - 'a';
			int shiftByX = (((-i) % n) + n) % n;
			int shiftByY = (((j) % m) + m) % m;
			for (int x = 0; x < n; x++) {
				int nx = (x + shiftByX);
				if (nx >= n) nx -= n;
				result[nx] &= getShifted(b[c][x], m, shiftByY);
			}
		}
	}

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			putchar(result[i][j] ? '1' : '0');
		}
		puts("");
	}
}

import java.io.*;
import java.util.*;

public class Main {

    static class InputReader {
        BufferedReader bufferedReader;
        StringTokenizer stringTokenizer;
        InputReader(InputStream inputStream) {
            bufferedReader = new BufferedReader(new InputStreamReader(inputStream), 32768);
            stringTokenizer = null;
        }
        String next() {
            while (stringTokenizer == null || !stringTokenizer.hasMoreTokens()) {
                try {
                    stringTokenizer = new StringTokenizer(bufferedReader.readLine());
                } catch (IOException ex) {
                    ex.printStackTrace();
                    throw new RuntimeException(ex);
                }
            }
            return stringTokenizer.nextToken();
        }
        int nextInt() {
            return Integer.parseInt(next());
        }
        long nextLong() {
            return Long.parseLong(next());
        }
        double nextDouble() {
            return Double.parseDouble(next());
        }
    }

    static int[] newBitSet(int n) {
        return new int[(n + 31) / 32];
    }

    static void setBit(int[] a, int pos) {
        a[pos >>> 5] |= (1 << (pos & 31));
    }

    static boolean getBit(int[] a, int pos) {
        return ((a[pos >>> 5]) & (1 << (pos & 31))) != 0;
    }

    static void setAll(int[] a) {
        for (int i = 0; i < a.length; i++) {
            a[i] = ~0;
        }
    }

    static void resetAll(int[] a) {
        for (int i = 0; i < a.length; i++) {
            a[i] = 0;
        }
    }

    static void andXYtoX(int[] x, int[] y) {
        for (int i = 0; i < x.length; i++) {
            x[i] &= y[i];
        }
    }

    static void leftShiftAndOr(int ch, int shift, int x, int[][][][] shl, int[] to) {
        int[] z = shl[ch][shift & 31][x];
        int delta = (shift >>> 5);
        for (int i = delta; i < to.length; i++) {
            to[i - delta] |= z[i];
        }
    }

    static void rightShiftAndOr(int ch, int shift, int x, int[][][][] shr, int[] to) {
        int[] z = shr[ch][shift & 31][x];
        int delta = (shift >>> 5);
        for (int i = 0; i + delta < to.length; i++) {
            to[i + delta] |= z[i];
        }
    }

    static void printBitset(int a[], int l, int r) {
        for (int i = l; i <= r; i++) {
            System.err.print(getBit(a, i) ? '1' : '0');
        }
        System.err.println();
    }

    static final int ALPHA = 26;

    public static void main(String[] args) {
        InputReader in = new InputReader(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int n = in.nextInt();
        int m = in.nextInt();

        int[][][][] shl = new int[ALPHA][32][n][];
        int[][][][] shr = new int[ALPHA][32][n][];

        for (int c = 0; c < ALPHA; c++) {
            for (int sh = 0; sh < 32; sh++) {
                for (int i = 0; i < n; i++) {
                    shl[c][sh][i] = newBitSet(m);
                    shr[c][sh][i] = newBitSet(m);
                }
            }
        }

        String[] s = new String[n];

        for (int i = 0; i < n; i++) {
            s[i] = in.next();
            for (int j = 0; j < m; j++) {
                int c = s[i].charAt(j) - 'a';
                for (int sh = 0; sh < 32; sh++) {
                    if (j - sh >= 0) {
                        setBit(shl[c][sh][i], j - sh);
                    }
                    if (j + sh < m) {
                        setBit(shr[c][sh][i], j + sh);
                    }
                }
            }
        }

        int r = in.nextInt();
        int c = in.nextInt();

        String[] patt = new String[r];

        int[][] res = new int[n][];

        for (int i = 0; i < n; i++) {
            res[i] = newBitSet(m);
            setAll(res[i]);
        }

        int[] tmp = newBitSet(m);

        for (int i = 0; i < r; i++) {
            patt[i] = in.next();
            for (int j = 0; j < c; j++) {
                if (patt[i].charAt(j) == '?') continue;
                int cur = patt[i].charAt(j) - 'a';
                int shiftByX = (((-i) % n) + n) % n;
                int shiftByY = (((j) % m) + m) % m;

                for (int x = 0; x < n; x++) {
                    int nx = x + shiftByX;
                    if (nx >= n) nx -= n;
                    resetAll(tmp);
                    leftShiftAndOr(cur, shiftByY, x, shl, tmp);
                    rightShiftAndOr(cur, m - shiftByY, x, shr, tmp);
                    andXYtoX(res[nx], tmp);
                }
            }
        }

        for (int i = 0; i < n; i++) {
            for (int j = 0; j < m; j++) {
                out.print(getBit(res[i], j) ? '1' : '0');
            }
            out.println();
        }

        out.close();
    }
}