#include<bits/stdc++.h>
using namespace std;
#define int long long
#define in pair<int, int>
#define f first
#define s second
#define pb push_back
#define pob pop_back
#define INF (int)1e17
#define fast() ios_base::sync_with_stdio(false); cin.tie(NULL)
const int MX = 3e5+5;
int cnt[MX][2];
signed main()
{
fast();
int n;
cin >> n;
array<int, 2> pt[n];
for(int i = 0; i < n; i++)
cin >> pt[i][0] >> pt[i][1];
vector<int> V;
for(int i = 0; i < n; i++)
V.pb(pt[i][0]);
sort(V.begin(), V.end());
vector<int> M; M.pb(V[0]);
for(int k: V)
{
if(k != M.back())
M.pb(k);
}
for(int i = 0; i < n; i++)
{
pt[i][0] = lower_bound(M.begin(), M.end(), pt[i][0])-M.begin();
cnt[pt[i][0]][0]++;
}
V.clear();
M.clear();
for(int i = 0; i < n; i++)
V.pb(pt[i][0]);
sort(V.begin(), V.end());
M.pb(V[0]);
for(int k: V)
{
if(k != M.back())
M.pb(k);
}
for(int i = 0; i < n; i++)
{
pt[i][1] = lower_bound(M.begin(), M.end(), pt[i][1])-M.begin();
cnt[pt[i][1]][1]++;
}
int ans = 0;
for(int i = 0; i < n; i++)
ans+=((cnt[pt[i][0]][0]-1)*(cnt[pt[i][1]][1]-1));
cout << ans << "\n";
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
