Submission #707026

#	Time	Username	Problem	Language	Result	Execution time	Memory
707026		ToroTN	Star triangles (IZhO11_triangle)	C++14	0 / 100	111 ms	7456 KiB

triangle

#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll n,x[300005],y[30005],cnt=0;
map<ll,ll> mp1,mp2;
int main()
{
    scanf("%lld",&n);
    for(int i=1;i<=n;i++)
    {
        scanf("%lld%lld",&x[i],&y[i]);
        ++mp1[x[i]],++mp2[y[i]];
    }
    for(int i=1;i<=n;i++)
    {
        cnt+=(mp1[x[i]]-1)*(mp2[y[i]]-1);
    }
    printf("%lld\n",cnt);
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
triangle.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         scanf("%lld%lld",&x[i],&y[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100