Submission #2407561


Source Code Expand

#include <cstdio>
#include <iostream>
#include <vector>
using namespace std;

long long INF = 1e18;
long long x[1010][1010];
long long d[1010];

int main(){
  int n, m;
  cin >> n >> m;

  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      x[i][j] = INF;
    }
    d[i] = INF;
  }
  d[0] = 0;
  for (int i = 0; i < m; i++) {
    int a, b; long long c;
    cin >> a >> b >> c;
    x[a-1][b-1] = -c;
  }

  for (int i = 0; i < n-1; i++) {
    for (int v = 0; v < n; v++) {
      for (int w = 0; w < n; w++) {
        if (x[v][w] != INF && d[w] > d[v] + x[v][w]){
          d[w] = d[v] + x[v][w];
        }
      }
    }
  }

  //負の経路を判定
  vector<bool> roop(n);
  for (int v = 0; v < n; v++) {
    for (int w = 0; w < n; w++) {
      if (x[v][w] != INF && d[w] > d[v] + x[v][w]){
        d[w] = d[v] + x[v][w];
        roop[v] = true;
        roop[w] = true;
      }
    }
  }
  for (int v = 0; v < n; v++) {
    for (int w = 0; w < n; w++) {
      if (x[v][w] != INF && roop[v] == true){
        roop[w] = true;
      }
    }
  }

  if (roop[n-1] == true) printf("inf\n");
  else printf("%lld\n", -d[n-1]);
  return 0;
}

Submission Info

Submission Time
Task D - Score Attack
User potoooooooo
Language C++14 (GCC 5.4.1)
Score 400
Code Size 1209 Byte
Status AC
Exec Time 719 ms
Memory 8192 KB

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 400 / 400
Status
AC × 3
AC × 30
Set Name Test Cases
Sample sample_01.txt, sample_02.txt, sample_03.txt
All sample_01.txt, sample_02.txt, sample_03.txt, subtask_1_1.txt, subtask_1_10.txt, subtask_1_11.txt, subtask_1_12.txt, subtask_1_13.txt, subtask_1_14.txt, subtask_1_15.txt, subtask_1_16.txt, subtask_1_17.txt, subtask_1_18.txt, subtask_1_19.txt, subtask_1_2.txt, subtask_1_20.txt, subtask_1_21.txt, subtask_1_22.txt, subtask_1_23.txt, subtask_1_24.txt, subtask_1_25.txt, subtask_1_26.txt, subtask_1_27.txt, subtask_1_3.txt, subtask_1_4.txt, subtask_1_5.txt, subtask_1_6.txt, subtask_1_7.txt, subtask_1_8.txt, subtask_1_9.txt
Case Name Status Exec Time Memory
sample_01.txt AC 1 ms 256 KB
sample_02.txt AC 1 ms 256 KB
sample_03.txt AC 1 ms 256 KB
subtask_1_1.txt AC 63 ms 4224 KB
subtask_1_10.txt AC 1 ms 256 KB
subtask_1_11.txt AC 35 ms 3968 KB
subtask_1_12.txt AC 258 ms 6400 KB
subtask_1_13.txt AC 674 ms 8192 KB
subtask_1_14.txt AC 693 ms 8192 KB
subtask_1_15.txt AC 719 ms 8192 KB
subtask_1_16.txt AC 1 ms 256 KB
subtask_1_17.txt AC 2 ms 640 KB
subtask_1_18.txt AC 184 ms 6400 KB
subtask_1_19.txt AC 615 ms 7808 KB
subtask_1_2.txt AC 695 ms 8192 KB
subtask_1_20.txt AC 674 ms 8192 KB
subtask_1_21.txt AC 690 ms 8192 KB
subtask_1_22.txt AC 715 ms 8192 KB
subtask_1_23.txt AC 1 ms 256 KB
subtask_1_24.txt AC 302 ms 6400 KB
subtask_1_25.txt AC 66 ms 4224 KB
subtask_1_26.txt AC 695 ms 8192 KB
subtask_1_27.txt AC 695 ms 8192 KB
subtask_1_3.txt AC 322 ms 6400 KB
subtask_1_4.txt AC 694 ms 8192 KB
subtask_1_5.txt AC 144 ms 6400 KB
subtask_1_6.txt AC 689 ms 8192 KB
subtask_1_7.txt AC 571 ms 7680 KB
subtask_1_8.txt AC 693 ms 8192 KB
subtask_1_9.txt AC 1 ms 256 KB