Cod sursa(job #3297631)

Utilizator andrei65tAndrei Popescu-Ilioniu andrei65t Data 23 mai 2025 10:01:02
Problema Stramosi Scor 80
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.63 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin("stramosi.in");
ofstream fout("stramosi.out");
int RMQ[250001][18];
int query(int x, int d) {
    int p=0;
    while(d&&x) {
        if(d&1) x=RMQ[x][p];
        d>>=1;
        p++;
    }
    return x;
}
int main(){
    int n,m;
    fin>>n>>m;
    int col=0,cn=n;
    while(cn)
    {
        cn>>=1;
        col++;
    }
    for(int i=1;i<=n;i++)
        fin>>RMQ[i][0];
    for(int j=1;j<col;j++)
        for(int i=1;i<=n;i++)
            RMQ[i][j]=RMQ[RMQ[i][j-1]][j-1];

    int x,y;
    for(int i=1;i<=m;i++){
        fin>>x>>y;
        fout<<query(x,y)<<endl;
    }
    return 0;
}