Submission #532234

#	Time	Username	Problem	Language	Result	Execution time	Memory
532234		andecaandeci	Star triangles (IZhO11_triangle)	C++17	100 / 100	364 ms	13352 KiB

triangle

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define fi first
#define se second
int main(){
    int tc;
    scanf("%d",&tc);
    vector<pair<int,int> > v;
    map <int,int> mpx,mpy;
    for(int i=1;i<=tc;i++){
        int x,y;
        scanf("%d%d",&x,&y);
        mpx[x]++;
        mpy[y]++;
        v.push_back(make_pair(x,y));
    }
    int ans = 0;
    for(auto p : v){
        int x = p.fi,y = p.se;
        ans += (mpx[x] - 1) * (mpy[y] - 1);
    }
    printf("%d",ans);
    return 0;
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d",&tc);
      |     ~~~~~^~~~~~~~~~
triangle.cpp:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%d%d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 100 / 100