Submission #314264

#	Time	Username	Problem	Language	Result	Execution time	Memory
314264		Trickster	별들과 삼각형 (IZhO11_triangle)	C++14	100 / 100	958 ms	15612 KiB

triangle

#include <algorithm>
#include <string.h>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <set>
#include <map>

using namespace std;

#define N 300010
#define ff first
#define ss second
#define ll long long
#define pb push_back
#define mod 1000000007
#define pii pair <ll, ll>
#define sz(a) ll(a.size())
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
ll bigmod(ll a,ll e) {if(e==0)return 1;ll x=bigmod(a*a%mod,e>>1);return e&1?x*a%mod:x;}

pii p[N];
ll n, x, y;
map <ll, ll> R, C;

int main()
{
    cin >> n;

    ll ans = 0;
    for(ll i = 1; i <= n; i++) {
        cin >> x >> y;

        R[x]++, C[y]++;
        p[i] = {x, y};
    }
    
    for(ll i = 1; i <= n; i++) ans += (R[p[i].ff] - 1) * (C[p[i].ss] - 1);

    cout << ans;
}

Compilation message (stderr)

triangle.cpp:22: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
   22 | #pragma GCC optimization ("O3")
      | 
triangle.cpp:23: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
   23 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 100 / 100