제출 #76212

#제출 시각아이디문제언어결과실행 시간메모리
76212nvmdava별들과 삼각형 (IZhO11_triangle)C++17
100 / 100
854 ms39120 KiB
#include <bits/stdc++.h> using namespace std; map<int, int> x, y; int xx[300001], yy[300001]; int main(){ int n; cin>>n; for(int i = 1; i <= n; i++){ cin>>xx[i]>>yy[i]; x[xx[i]]++; y[yy[i]]++; } long long s = 0; for(int i = 1; i <= n; i++){ s += (long long)(x[xx[i]] - 1) * (y[yy[i]] - 1); } cout<<s; }
#Verdict Execution timeMemoryGrader output
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