제출 #1308535

#제출 시각아이디문제언어결과실행 시간메모리
1308535buinamkhanh별들과 삼각형 (IZhO11_triangle)C++20
0 / 100
1 ms332 KiB
#include <iostream> #define int long long using namespace std; int n,x[300005],y[300005],a1,a2,ans=0; signed main() { ios_base::sync_with_stdio(false); cin.tie(0);cout.tie(0); freopen("stdin","r",stdin); freopen("stdout","w",stdout); cin>>n; for (int i=1; i<=n; i++) cin>>x[i]>>y[i]; for (int i=1; i<=n; i++) { a1=-1;a2=-1; for (int j=1; j<=n; j++) { if (x[j]==x[i]) a1++; if (y[j]==y[i]) a2++; } ans+=a1*a2; } cout<<ans; }

컴파일 시 표준 에러 (stderr) 메시지

triangle.cpp: In function 'int main()':
triangle.cpp:8:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |         freopen("stdin","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~
triangle.cpp:9:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |         freopen("stdout","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~

Subtask 10 / 100

#Verdict Execution timeMemoryGrader output
Fetching results...