oj.uz

Submission #531864

# Submission time Handle Problem Language Result Execution time Memory
531864 2022-03-01T17:55:15 Z makanhulia Star triangles (IZhO11_triangle) C++17
100 / 100
 945 ms 31176 KB 
#include <bits/stdc++.h>
using namespace std;
 
typedef long long ll;
typedef double db;
#define pairll pair<ll,ll>
#define lpairll pair<pairll,ll>
 
#define pb push_back
#define mp make_pair
#define fr first
#define sc second
#define repp(i,a,b) for(ll i = (a); i <= (b); i++)
#define repm(i, a, b) for (ll i = (a); i >= (b); i--)
#define repz(i, a, b) for (ll i = (a); i < (b); i++)
 
const long long MOD = 1e9+7, N = 3e5 + 5, Q = 4e3+5;

ll tc = 1, n, m=0,k, x[N], y[N];
string s, ye = "YES", no = "NO";
vector<ll> res;
map<pairll,ll> mapz;
map<ll,ll> frx,fry;

void fastt(){  
  ios_base::sync_with_stdio(0); 
  cin.tie(NULL);
  cout.tie(NULL);  
}

void input(){
  cin >> n;
  repp(i,1,n){
    cin >> x[i] >> y[i];
    frx[x[i]]++;
    fry[y[i]]++;
    mapz[mp(x[i],y[i])]++;
  }
}

void solve(){
  ll ans = 0;
  repp(i,1,n){
    ll X = x[i], Y = y[i], sem;
    sem = mapz[mp(X,Y)];
    ans += (frx[X]-sem)*(fry[Y]-sem);
  }
  cout << ans << endl;
}

int main(){
  // freopen("input.txt", "r", stdin);
  // freopen("output.txt", "w", stdout);
  fastt();
  //cin >> tc;
  while(tc--){
    input();
    solve();
  }
}

/*

*/

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 1 ms 320 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 332 KB Output is correct
7 Correct 1 ms 332 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 324 KB Output is correct
11 Correct 2 ms 452 KB Output is correct
12 Correct 10 ms 1860 KB Output is correct
13 Correct 9 ms 1904 KB Output is correct
14 Correct 18 ms 2320 KB Output is correct
15 Correct 265 ms 14196 KB Output is correct
16 Correct 272 ms 15148 KB Output is correct
17 Correct 234 ms 14272 KB Output is correct
18 Correct 221 ms 14192 KB Output is correct
19 Correct 896 ms 29216 KB Output is correct
20 Correct 558 ms 23304 KB Output is correct
21 Correct 945 ms 31176 KB Output is correct
22 Correct 918 ms 31168 KB Output is correct