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답안 #420255

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
420255 2021-06-08T08:29:48 Z cpp219 별들과 삼각형 (IZhO11_triangle) C++14
100 / 100
 142 ms 7716 KB 
#pragma GCC optimization "O2"
#pragma GCC optimization "unroll-loop"
#pragma GCC target ("avx2")

#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define fs first
#define sc second
using namespace std;
const ll N = 3e5 + 9;
const ll mod = 1e9 + 7;
typedef pair<ll,ll> LL;
unordered_map<ll,ll> mpx,mpy;
ll n,ans;
LL a[N];

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    #define task "tst"
    if (fopen(task".inp", "r")){
        freopen(task".inp", "r", stdin);
        //freopen(task".out", "w", stdout);
    }
    cin>>n;
    for (ll i = 1;i <= n;i++){
        cin>>a[i].fs>>a[i].sc;
        mpx[a[i].fs]++; mpy[a[i].sc]++;
    }
    for (ll i = 1;i <= n;i++){
        ll p = mpx[a[i].fs] - 1,q = mpy[a[i].sc] - 1;
        ans += p*q;
    }
    cout<<ans;
}

Compilation message

triangle.cpp:1: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    1 | #pragma GCC optimization "O2"
      | 
triangle.cpp:2: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
    2 | #pragma GCC optimization "unroll-loop"
      | 
triangle.cpp: In function 'int main()':
triangle.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 5 ms 844 KB Output is correct
13 Correct 5 ms 844 KB Output is correct
14 Correct 7 ms 1136 KB Output is correct
15 Correct 48 ms 4468 KB Output is correct
16 Correct 53 ms 4576 KB Output is correct
17 Correct 68 ms 4456 KB Output is correct
18 Correct 49 ms 4416 KB Output is correct
19 Correct 127 ms 7376 KB Output is correct
20 Correct 105 ms 6132 KB Output is correct
21 Correct 142 ms 7716 KB Output is correct
22 Correct 138 ms 7688 KB Output is correct