oj.uz

Submission #331088

# Submission time Handle Problem Language Result Execution time Memory
331088 2020-11-27T09:59:20 Z Sho10 Star triangles (IZhO11_triangle) C++14
100 / 100
 511 ms 15724 KB 
#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho10
#define ll long long
#define double long double
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define all(a) (a).begin(), (a).end()
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define pi pair
#define rc(s) return cout<<s,0
#define endl '\n'
#define mod 1000007
#define PI 3.14159265359
#define MAXN 100005
#define INF 1000000005
#define LINF 1000000000000000005ll
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll n;
pair<ll,ll>a[300005];
map<ll,ll>x,y;
int32_t main(){
CODE_START
cin>>n;
for(ll i=1;i<=n;i++){
    cin>>a[i].f>>a[i].s;
    x[a[i].f]++;
    y[a[i].s]++;
}
ll ans=0;
for(ll i=1;i<=n;i++)
{
    ans+=(x[a[i].f]-1)*(y[a[i].s]-1);
}
cout<<ans<<endl;
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 1 ms 364 KB Output is correct
12 Correct 7 ms 1260 KB Output is correct
13 Correct 7 ms 1388 KB Output is correct
14 Correct 12 ms 1772 KB Output is correct
15 Correct 171 ms 8148 KB Output is correct
16 Correct 200 ms 8420 KB Output is correct
17 Correct 146 ms 7916 KB Output is correct
18 Correct 151 ms 7916 KB Output is correct
19 Correct 462 ms 14828 KB Output is correct
20 Correct 313 ms 11884 KB Output is correct
21 Correct 511 ms 15572 KB Output is correct
22 Correct 488 ms 15724 KB Output is correct