Submission #9151

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
9151	2014-09-28T04:07:22 Z	maniac	Your life (kriii2_Y)	C++	4 / 4	84 ms	7712 KB

Y

#include<cstdio>
#include<cassert>
#include<cstring>
#include<map>
#include<set>
#include<time.h>
#include<algorithm>
#include<stack>
#include<queue>
#include<utility>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<limits>
   
using namespace std;

long long gcd( long long b, long long s ){
	return (s!=0) ? gcd( s, b%s ) : b;
}

const int N = 100005;
const int INF = 1000000007;
vector <int> e[N];
int d[N];

int main(){
	
	
	int n, m;
	scanf("%d %d", &n, &m);

	for(int i=0; i<m; i++){
		int x, y;
		scanf("%d %d", &x, &y);
		e[x].push_back( y );
	}

	queue <int> q;

	for(int i=1; i<=n; i++)
		d[i] = INF;
	q.push( 1 );
	d[1] = 0;
	while( !q.empty() ){
		int p = q.front(); q.pop();

		for(int i=0; i<e[p].size(); i++){
			int u = e[p][i];
			if( d[p]+1 < d[u] ){
				d[u] = d[p] + 1;
				q.push( u );
			}
		}
	}
		

	if( d[n] != INF )
		printf("%d\n", d[n]);
	else
		puts("-1");

}

Subtask #1

1.0 / 1.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	4416 KB	Output is correct
2	Correct	0 ms	4416 KB	Output is correct
3	Correct	0 ms	4416 KB	Output is correct
4	Correct	0 ms	4416 KB	Output is correct
5	Correct	0 ms	4416 KB	Output is correct
6	Correct	0 ms	4416 KB	Output is correct
7	Correct	0 ms	4416 KB	Output is correct
8	Correct	0 ms	4416 KB	Output is correct
9	Correct	0 ms	4416 KB	Output is correct
10	Correct	20 ms	4952 KB	Output is correct

Subtask #2

3.0 / 3.0

#	Verdict	Execution time	Memory	Grader output
1	Correct	0 ms	4416 KB	Output is correct
2	Correct	40 ms	7452 KB	Output is correct
3	Correct	64 ms	7452 KB	Output is correct
4	Correct	48 ms	7452 KB	Output is correct
5	Correct	56 ms	7452 KB	Output is correct
6	Correct	36 ms	7452 KB	Output is correct
7	Correct	32 ms	7452 KB	Output is correct
8	Correct	84 ms	7712 KB	Output is correct
9	Correct	44 ms	7452 KB	Output is correct
10	Correct	72 ms	7188 KB	Output is correct