Submission #692996

#	Time	Username	Problem	Language	Result	Execution time	Memory
692996		ktkerem	Star triangles (IZhO11_triangle)	C++17	100 / 100	448 ms	15544 KiB

triangle

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
#include<bits/stdc++.h>
//typedef int ll;
typedef long long ll;
typedef unsigned long long ull;
#define llll std::pair<ll , ll>
#define pb push_back
#define pf push_front
#define halo cout << "hello" << std::endl
#define fi first
#define sec second
#define all(a) a.begin() , a.end()
const ll limit = 1e18+7; 
const ll ous = 2e5 + 500;
const ll dx[4] = {-1 , 0 , 1 , 0} , dy[4] = {0,1,0,-1};
std::mt19937 rng(std::chrono::steady_clock::now().time_since_epoch().count());
ll n;
std::map<ll , ll> mpx , mpy;
std::vector<llll> ar;
void solve(){
    std::cin >> n;
    ar.resize(n);
    for(ll i = 0 ; n>i;i++){
        std::cin >> ar[i].fi >> ar[i].sec;
        mpx[ar[i].fi]++;
        mpy[ar[i].sec]++;
    }
    ll ans = 0;
    for(ll i = 0;n>i;i++){
        ans+=(mpx[ar[i].fi]-1) * (mpy[ar[i].sec]-1); 
    }
    std::cout << ans << "\n";
    return;/**/
}
signed main(){
    //std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
    ll t=1;
    //std::cin >> t;
    ll o = 1;
    while(t--){ 
        //std::cout << "Case " << o << ": ";
        //o++;
        solve();        
    }
    return 0;
}/**/

Compilation message (stderr)

triangle.cpp:5:78: warning: "/*" within comment [-Wcomment]
    5 | #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")/**/
      |                                                                               
triangle.cpp: In function 'int main()':
triangle.cpp:43:8: warning: unused variable 'o' [-Wunused-variable]
   43 |     ll o = 1;
      |        ^

• Subtask 1: 100 / 100