Submission #939891

#	Time	Username	Problem	Language	Result	Execution time	Memory
939891		Pichon5	Ekoeko (COCI21_ekoeko)	C++17	0 / 110	1059 ms	348 KiB

Main

#include <bits/stdc++.h>
#define pb push_back
#define vi vector<int>
#define int long long
#define ll long long
#define FIO ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
using namespace std;
const int tam=200005;
int T[tam];
int cant[28];
int aux[28];
int n;
int query(int pos){
    int res=0;
    while(pos>0){
        res+=T[pos];
        pos-=pos&-pos;
    }
    return res;
}
void update(int pos, int val){
    while(pos<tam){
        T[pos]+=val;
        pos+=pos&-pos;
    }
}
int inver(vi P){
    int res=0;
    for(int i=0;i<n;i++){
        res+=query(tam-1)-query(P[i]);
        update(P[i],1);
    }
    return res;
}
int solve(string a, string b){
    int res=0;
    queue<int>Q[28];
    for(int i=0;i<n;i++){
        Q[a[i]-'a'].push(i+1);
    }
    vi P;
    for(int i=0;i<n;i++){
        P.pb(Q[b[i]-'a'].front());
        Q[b[i]-'a'].pop();
    }
    return inver(P);
}       
signed main(){
    FIO;
    string s;
    cin>>n;
    cin>>s;
    string a=s.substr(0,n);
    string b=s.substr(n,n);
    cout<<solve(a,b)<<"\n";
        
    return 0;
}
// Porque en realidad no sabes lo que duеle
// Darlo todo por alguien que no tе quiere

Compilation message (stderr)

Main.cpp: In function 'long long int solve(std::string, std::string)':
Main.cpp:36:9: warning: unused variable 'res' [-Wunused-variable]
   36 |     int res=0;
      |         ^~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 20
• Subtask 5: 0 / 40