Submission #9161

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
9161	2014-09-28 04:13:29	kcm1700	Your life (kriii2_Y)	C++14	4 / 4	76 ms	7116 KiB

Y

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#include <cstdio>
#include <algorithm>
using namespace std;
int n,m;
int dt[100303];
vector<int> jump[100330];
int main(){
  scanf("%d%d",&n,&m);
  for(int i = 0; i < m; i++) {
    int x,y;
    scanf("%d%d",&x,&y);
    jump[x].push_back(y);
  }
  dt[1] = 1;
  for(int i = 1; i <= n; i++) {
    if (dt[i] == 0) continue;
    for(auto v : jump[i]) {
      if (dt[v] == 0 || dt[v] > dt[i] + 1){
        dt[v] = dt[i] + 1;
      }
    }
  }
  printf("%d\n",dt[n]-1);
  return 0;
}
 
 
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• Subtask 1: 1 / 1
• Subtask 2: 3 / 3