/*
author : abushbandit
contest : ---
*/
#include "bits/stdc++.h"
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define int long long
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define ff first
#define ss second
#define pb push_back
#define rep(i,s,f) for(int i = s;i < f;i++)
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
#pragma GCC target("avx,avx2,fma")
#pragma GCC optimize("Ofast,unroll-loops")
template <class type1>
using ordered_multiset = tree <type1, null_type, less_equal <type1>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef vector<pair<int,int>> vii;
typedef pair<int,int> pii;
const ll INF = 1e18;
const ll MOD7 = 1e9 + 7;
const ll MOD9 = 998244353;
const ld PI = acos(-1.0);
const int N = 1e5 + 2;
template <class F, class _S>
bool chmin(F &u, const _S &v){
bool flag = false;
if ( u > v ){
u = v; flag |= true;
}
return flag;
}
template <class F, class _S>
bool chmax(F &u, const _S &v){
bool flag = false;
if ( u < v ){
u = v; flag |= true;
}
return flag;
}
int binpow (int a, int n) {
int res = 1;
while (n) {
if (n & 1)
res *= a;
a *= a;
n >>= 1;
}
return res;
}
void start_file(string file){
freopen((file + ".in").c_str(),"r",stdin);
freopen((file + ".out").c_str(),"w",stdout);
}
void solve(int tc){
int n;
cin >> n;
vector<int> x(n),y(n);
map<int,int> mpx,mpy;
for(int i = 0;i < n;i++){
cin >> x[i] >> y[i];
mpx[x[i]]++;mpy[y[i]]++;
}
int ans = 0;
for(int i = 0;i < n;i++){
ans += 1ll * (mpx[x[i]] - 1) * (mpy[y[i]] - 1);
}
cout << ans;
}
signed main(){
// start_file("");
ios_base::sync_with_stdio(0);
cin.tie(0);cout.tie(0);
int test_cases = 1;
// cin >> test_cases ;
for(int tc = 1;tc <= test_cases;++ tc){
solve(tc);
}
}
/*
*/
Compilation message
triangle.cpp: In function 'void start_file(std::string)':
triangle.cpp:75:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
75 | freopen((file + ".in").c_str(),"r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
triangle.cpp:76:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
76 | freopen((file + ".out").c_str(),"w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
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 |
Correct |
1 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
376 KB |
Output is correct |
| 6 |
Correct |
1 ms |
456 KB |
Output is correct |
| 7 |
Correct |
0 ms |
424 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
1 ms |
460 KB |
Output is correct |
| 10 |
Correct |
1 ms |
348 KB |
Output is correct |
| 11 |
Correct |
1 ms |
348 KB |
Output is correct |
| 12 |
Correct |
5 ms |
1232 KB |
Output is correct |
| 13 |
Correct |
6 ms |
1372 KB |
Output is correct |
| 14 |
Correct |
8 ms |
1884 KB |
Output is correct |
| 15 |
Correct |
98 ms |
8092 KB |
Output is correct |
| 16 |
Correct |
93 ms |
8276 KB |
Output is correct |
| 17 |
Correct |
89 ms |
8020 KB |
Output is correct |
| 18 |
Correct |
90 ms |
8076 KB |
Output is correct |
| 19 |
Correct |
246 ms |
14868 KB |
Output is correct |
| 20 |
Correct |
171 ms |
11976 KB |
Output is correct |
| 21 |
Correct |
271 ms |
15696 KB |
Output is correct |
| 22 |
Correct |
268 ms |
15696 KB |
Output is correct |
