제출 #330924

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
330924	2020-11-26 21:59:21	ZwariowanyMarcin	별들과 삼각형 (IZhO11_triangle)	C++14	100 / 100	397 ms	10092 KiB

triangle

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#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define sz(x) (int)x.size()
using ll = long long;
using namespace std;
const int N = 1 << 20;
int n, x[N], y[N];
ll res;   
map<int, int> dx, dy;
int main() {
  scanf("%d", &n);
  for (int i = 0; i < n; ++i) {
    scanf("%d%d", x + i, y + i);
    dx[x[i]]++;
    dy[y[i]]++;
  }
  for (int i = 0; i < n; ++i)
    res += 1LL * (dx[x[i]] - 1) * (dy[y[i]] - 1);
  printf("%lld\n", res);
  return 0;
}
 
 
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컴파일 시 표준 에러 (stderr) 메시지

triangle.cpp: In function 'int main()':
triangle.cpp:17:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
triangle.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |   scanf("%d%d", x + i, y + i);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 100 / 100