Submission #884789

#	Time	Username	Problem	Language	Result	Execution time	Memory
884789		Isam	Star triangles (IZhO11_triangle)	C++17	100 / 100	238 ms	12260 KiB

triangle

#include<bits/stdc++.h>

#ifdef DEBUG
  #include "debug.h"
#else
  #define debug(...) void(37)
#endif

using namespace std;

signed main(){
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	int N;
	cin >> N;
	map<int, int> X, Y;
	vector<pair<int, int>> A(N);
	for(register int i = 0; i < N; ++i){
		cin >> A[i].first >> A[i].second;
		X[A[i].first]++, Y[A[i].second]++;
	}
	long long ans(0);
	for(register int i = 0; i < N; ++i){
		ans += 1ll * (X[A[i].first] - 1) * (Y[A[i].second] - 1);
	}
	cout << ans << '\n';
	return 0;
}

Compilation message (stderr)

triangle.cpp: In function 'int main()':
triangle.cpp:17:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   17 |  for(register int i = 0; i < N; ++i){
      |                   ^
triangle.cpp:22:19: warning: ISO C++17 does not allow 'register' storage class specifier [-Wregister]
   22 |  for(register int i = 0; i < N; ++i){
      |                   ^

• Subtask 1: 100 / 100