oj.uz

Submission #467939

# Submission time Handle Problem Language Result Execution time Memory
467939 2021-08-25T16:20:43 Z czhang2718 timeismoney (balkan11_timeismoney) C++14
0 / 100
 3 ms 380 KB 
#include "bits/stdc++.h"
using namespace std;

int n, m;
const int N=200;
int par[N];
vector<pair<int, pair<int, int>>> edges;

int find(int x){
  if(par[x]==x) return x;
  return par[x]=find(par[x]);
}

bool join(int x, int y){
  if(find(x)==find(y)) return 0;
  par[find(x)]=find(y);
  return 1;
}

int main(){
  cin.tie(0)->sync_with_stdio(0);
  freopen("timeismoney.in", "r", stdin);
  freopen("timeismoney.out", "w", stdout);

  cin >> n >> m;
  for(int i=0; i<n; i++) par[i]=i;
  for(int i=0; i<m; i++){
    int u, v, c, t; cin >> u >> v >> c >> t;
    edges.push_back({c, {u, v}});
  }
  int ans=0;
  sort(edges.begin(), edges.end());
  for(auto p:edges){
    int u=p.second.first;
    int v=p.second.second;
    if(join(u, v)) ans+=p.first;
  }
  cout << ans*ans;
}

Compilation message

timeismoney.cpp: In function 'int main()':
timeismoney.cpp:22:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |   freopen("timeismoney.in", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
timeismoney.cpp:23:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |   freopen("timeismoney.out", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
2 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
3 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
4 Incorrect 3 ms 332 KB Unexpected end of file - int64 expected
5 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
6 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
7 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
8 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
9 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
10 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
11 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
12 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
13 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
14 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
15 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
16 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
17 Incorrect 2 ms 380 KB Unexpected end of file - int64 expected
18 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected
19 Incorrect 2 ms 376 KB Unexpected end of file - int64 expected
20 Incorrect 2 ms 332 KB Unexpected end of file - int64 expected