Submission #9523

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
9523	2014-09-28 07:01:41	moonrabbit2	Your life (kriii2_Y)	C++98	1 / 4	16 ms	5032 KiB

Y

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#include <cstdio>
int n,m;
int link[1005][1005];
int main()
{
    for(int i=0;i<1000;i++)
        for(int j=0;j<1000;j++)
            link[i][j]=-1;
    scanf("%d %d",&n,&m);
    for(int i=0,a,b;i<m;i++){
        scanf("%d %d",&a,&b);
        a--;b--;
        link[a][b]=1;
    }
    for(int k=0;k<n;k++){
        for(int i=0;i<n;i++){
            if(link[i][k]==-1)continue;
            for(int j=0;j<n;j++){
                if(link[k][j]==-1)continue;
                if(link[i][j]>link[i][k]+link[k][j]||link[i][j]==-1)
                    link[i][j]=link[i][k]+link[k][j];
            }
        }
    }
    printf("%d",link[0][n-1]);
    return 0;
}
 
 
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