Submission #8854

#	Time	Username	Problem	Language	Result	Execution time	Memory
8854		gs13068	Your life (kriii2_Y)	C++98	4 / 4	80 ms	9844 KiB

Y

#include<cstdio>
#include<vector>

std::vector<int> a[200001];
int d[200001];

int main()
{
	int n,m;
	int i,j,x,y;
    scanf("%d%d",&n,&m);
    for(i=1;i<=m;i++)
	{
		scanf("%d%d",&x,&y);
		a[x].push_back(y);
	}
	for(i=1;i<=n;i++)d[i]=2e9;
    d[1]=0;
	for(i=1;i<=n;i++)for(j=0;j<a[i].size();j++)if(d[a[i][j]]>d[i]+1)d[a[i][j]]=d[i]+1;
	printf("%d",d[n]<1e9?d[n]:-1);
}

• Subtask 1: 1 / 1
• Subtask 2: 3 / 3