Cod sursa(job #2789608)

Utilizator Ciprian089Cirstea Ciprian Ciprian089 Data 27 octombrie 2021 18:31:09
Problema Range minimum query Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.78 kb
#include <iostream>

using namespace std;

const int MAX_N = 100'005;
const int LOG = 17;
int a[MAX_N];
int m[MAX_N][LOG];




int query(int L , int R){
    int length = L - R + 1;
    int k = 0;
    while((1 << k + 1) <= length )
        k++;
    return min(m[L][k] , m[R - (1 <<k) + 1][k]);
}


int main() {

    int n;
    cin >> n;
    for(int i = 0; i < n; i++){
        cin >> a[i];
        m[i][0] = a[i];
    }
    //procesare

    for(int k = 1; k < LOG; k++){
        for(int i = 0; i + (1 << k) - 1 <=n; i++){
            m[i][k] = min(m[i][k - 1] , m[i + (1 << (k + 1))][k - 1]);
        }
    }
    //raspundem la intrebari
    int q;
    cin >> q;
    int L , R;
    for(int i = 0; i < q; i++){
        cin >> L >> R;
        cout << query(L , R) << "\n";
    }

    return 0;

}