oj.uz

Submission #920312

# Submission time Handle Problem Language Result Execution time Memory
920312 2024-02-02T12:45:31 Z zeta7532 Star triangles (IZhO11_triangle) C++17
100 / 100
 279 ms 18008 KB 
#include <bits/stdc++.h>
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
using namespace std;
using ll = long long;
const ll mod = 998244353;
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<n;i++)
#define all(x) x.begin(),x.end()
#define faster ios::sync_with_stdio(false);cin.tie(nullptr)

int main() {
    ll N;
    cin >> N;
    vector<ll> X(N),Y(N);
    rep(i,N) cin >> X[i] >> Y[i];
    vector<ll> x=X,y=Y;
    sort(all(x));
    x.erase(unique(all(x)),x.end());
    sort(all(y));
    y.erase(unique(all(y)),y.end());
    rep(i,N) X[i]=lower_bound(all(x),X[i])-x.begin();
    rep(i,N) Y[i]=lower_bound(all(y),Y[i])-y.begin();
    vector<ll> cntX(300500,0),cntY(300500,0);
    rep(i,N) cntX[X[i]]++;
    rep(i,N) cntY[Y[i]]++;
    ll ans=0;
    rep(i,N){
        ans+=(cntX[X[i]]-1)*(cntY[Y[i]]-1);
    }
    cout << ans << endl;
    return 0;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4956 KB Output is correct
2 Correct 2 ms 4952 KB Output is correct
3 Correct 2 ms 4952 KB Output is correct
4 Correct 2 ms 5152 KB Output is correct
5 Correct 2 ms 4952 KB Output is correct
6 Correct 2 ms 4952 KB Output is correct
7 Correct 2 ms 4956 KB Output is correct
8 Correct 2 ms 4952 KB Output is correct
9 Correct 3 ms 4952 KB Output is correct
10 Correct 2 ms 4952 KB Output is correct
11 Correct 2 ms 4956 KB Output is correct
12 Correct 8 ms 5468 KB Output is correct
13 Correct 10 ms 5468 KB Output is correct
14 Correct 11 ms 5468 KB Output is correct
15 Correct 100 ms 9400 KB Output is correct
16 Correct 100 ms 10068 KB Output is correct
17 Correct 93 ms 9416 KB Output is correct
18 Correct 98 ms 9392 KB Output is correct
19 Correct 257 ms 16980 KB Output is correct
20 Correct 186 ms 13660 KB Output is correct
21 Correct 279 ms 17912 KB Output is correct
22 Correct 276 ms 18008 KB Output is correct