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답안 #420254

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
420254 2021-06-08T08:29:27 Z cpp219 별들과 삼각형 (IZhO11_triangle) C++14
100 / 100
 400 ms 15672 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;
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 1 ms 204 KB Output is correct
2 Correct 1 ms 316 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 332 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 10 ms 1164 KB Output is correct
13 Correct 8 ms 1356 KB Output is correct
14 Correct 11 ms 1740 KB Output is correct
15 Correct 125 ms 7904 KB Output is correct
16 Correct 149 ms 8272 KB Output is correct
17 Correct 125 ms 7880 KB Output is correct
18 Correct 137 ms 7876 KB Output is correct
19 Correct 400 ms 14740 KB Output is correct
20 Correct 290 ms 11836 KB Output is correct
21 Correct 397 ms 15672 KB Output is correct
22 Correct 375 ms 15560 KB Output is correct