oj.uz

Submission #349636

# Submission time Handle Problem Language Result Execution time Memory
349636 2021-01-18T05:08:52 Z my99n Star triangles (IZhO11_triangle) C++17
0 / 100
 1 ms 364 KB 
#include<bits/stdc++.h>
using namespace std;

int x[300100], y[300100];
map<int,long long> mx, my;
int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n; cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> x[i] >> y[i];
    mx[x[i]]++; my[y[i]]++;
  }
  long long ans;
  for (int i = 0; i < n; i++) ans+=(mx[x[i]]-1)*(my[y[i]]-1);
  cout << ans;
  return 0;
}

Compilation message

triangle.cpp: In function 'int main()':
triangle.cpp:15:34: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   15 |   for (int i = 0; i < n; i++) ans+=(mx[x[i]]-1)*(my[y[i]]-1);
      |                               ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 364 KB Output isn't correct
2 Halted 0 ms 0 KB -