# |
Author |
Problem |
Lang |
Verdict |
Time |
Memory |
Sent |
Judged |
|
53560654 |
Practice:
mnbvmar |
1149E
- 22
|
C++17 (GCC 7-32)
|
Accepted
|
249 ms
|
27588 KB
|
2019-04-30 12:18:30 |
2019-04-30 12:18:31 |
|
#include <bits/stdc++.h>
using namespace std;
const int MaxN = 2e5 + 100;
int stack_sizes[MaxN];
vector<int> adj[MaxN];
int N, M;
int vertex_group_idx[MaxN];
bool visited[MaxN];
int group_xor[MaxN];
vector<int> vertex_groups[MaxN];
void DfsMakeLayers(int vert) {
visited[vert] = true;
vector<int> seen_layers;
for (int s : adj[vert]) {
if (!visited[s]) {
DfsMakeLayers(s);
}
seen_layers.push_back(vertex_group_idx[s]);
}
sort(seen_layers.begin(), seen_layers.end());
seen_layers.resize(unique(seen_layers.begin(), seen_layers.end()) -
seen_layers.begin());
seen_layers.push_back(1e9);
while (seen_layers[vertex_group_idx[vert]] == vertex_group_idx[vert]) {
++vertex_group_idx[vert];
}
const int group_id = vertex_group_idx[vert];
group_xor[group_id] ^= stack_sizes[vert];
vertex_groups[group_id].push_back(vert);
}
int main() {
ios_base::sync_with_stdio(0);
cin >> N >> M;
for (int i = 0; i < N; ++i) {
cin >> stack_sizes[i];
}
for (int i = 0; i < M; ++i) {
int u, v;
cin >> u >> v;
--u; --v;
adj[u].push_back(v);
}
for (int vert = 0; vert < N; ++vert) {
if (!visited[vert]) {
DfsMakeLayers(vert);
}
}
if (count(group_xor, group_xor + N, 0) == N) {
cout << "LOSE\n";
return 0;
}
int last_idx = N;
while (group_xor[last_idx] == 0)
--last_idx;
int touched_vertex = -1;
for (int vert : vertex_groups[last_idx]) {
if ((stack_sizes[vert] ^ group_xor[last_idx]) < stack_sizes[vert]) {
touched_vertex = vert;
break;
}
}
assert(touched_vertex != -1);
stack_sizes[touched_vertex] ^= group_xor[last_idx];
group_xor[last_idx] = 0;
for (int neigh : adj[touched_vertex]) {
const int group_idx = vertex_group_idx[neigh];
stack_sizes[neigh] ^= group_xor[group_idx];
group_xor[group_idx] = 0;
}
assert(count(group_xor, group_xor + N, 0) == N);
cout << "WIN\n";
for (int i = 0; i < N; ++i)
cout << stack_sizes[i] << " ";
cout << "\n";
}
Click to see test details