Submission #1322814

#	Time	Username	Problem	Language	Result	Execution time	Memory
1322814		serikabyde	PIN (CEOI10_pin)	C++20	30 / 100	50 ms	6784 KiB

pin

//Yel 
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define np next_permutation
#define YES {cout<<"YES";rt}
#define NO {cout<<"NO";rt;}
#define Yes cout<<"Yes";
#define No cout<<"No";
#define rep(st,pl,en) for(ll i=st;i<=en;i+=pl)  
#define ll long long
#define sz size()
#define pi pair<int,int>
#define F first
#define S second
#define dot fixed<<setprecision
#define str string
#define all(x) x.begin(),x.end()
#define allr(x) x.rbegin(),x.rend()
#define rt return
#define dl long double
#define Pi 3.141592653589793238462643383279
#define cnl cout<<'\n';
#define nl '\n'
#define int ll
#define co continue
#define open freopen("slalom.in","r",stdin);freopen("slalom.out","w",stdout);
using namespace std;
const int inf=1e18,mod=1e9+7,N=5e5+9;
int res=0;	
vector <string> v[5];
void abdu_abi(){
	int n,k;
	cin>>n>>k;
	for(int i=1;i<=n;i++){
		str s;
		cin>>s;
		//sec=s;
		for(int j=1;j<=4;j++){
			str sec=s;
			sec.erase(sec.begin()+j-1);
			//cout<<sec<<nl;
			v[j].pb(sec);
		}
	}
	int ans=0;
	for(int k=1;k<=4;k++){
		int cnt=1;
		sort(all(v[k]));
		for(int i=1;i<v[k].sz;i++){
			if(v[k][i]==v[k][i-1]){
				cnt++;
			}
			else{
				ans+=cnt*(cnt-1)/2;
				cnt=1;
			}
		}
		ans+=cnt*(cnt-1)/2;
	}
	cout<<ans;
}		
main(){
    //open;
    fast;
    int t=1;
    //cin>>t;
  	while(t--){
  		abdu_abi();
  	}
}

Compilation message (stderr)

pin.cpp:63:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   63 | main(){
      | ^~~~

• Subtask 1: 30 / 100