#include<bits/stdc++.h>
using namespace std;
int n,k,h,t,dp[110][100010],q[100010];
int main(){
	memset(dp,0x3f,sizeof(dp));
	scanf("%d%d",&n,&k);
	dp[0][0]=0;
	for(int i=1;i<=k;i++){
		int l,r;
		scanf("%d%d",&l,&r);
		for(int j=0;j<=n;j++)
			dp[i][j]=dp[i-1][j];
		h=1,t=0;
		for(int j=r;~j;j--){
			while(h<=t&&q[h]<l-j) h++;
			while(h<=t&&dp[i][q[t]]>dp[i][r-j]) t--;
			q[++t]=r-j;
			dp[i][j]=min(dp[i][j],dp[i-1][q[h]]+1);
		}
		h=1,t=0;
		for(int j=0;j<=min(r,n);j++){
			while(h<=t&&q[h]<j-r+l) h++;
			while(h<=t&&dp[i][q[t]]>dp[i][j]) t--;
			q[++t]=j;
			dp[i][j]=min(dp[i][j],dp[i-1][q[h]]+2);
		}
	}
	if(dp[k][n]==0x3f3f3f3f) printf("Hungry\n");
	else printf("Full\n%d\n",dp[k][n]);
	return 0;
}