Cod sursa(job #2789645)

Utilizator Ciprian089Cirstea Ciprian Ciprian089 Data 27 octombrie 2021 19:14:39
Problema Range minimum query Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.79 kb
#include <fstream>

using namespace std;

ifstream cin("rmq.in");
ofstream cout("rmq.out");

const int MAX_N = 100005;
const int LOG = 17;
int a[MAX_N];
int m[MAX_N][LOG];





int query(int L , int R){
    int length = R - L + 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];
    }

    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]);
        }
    }

    int q;
    cin >> q;
    int L , R;
    for(int i = 0; i < q; i++){
        cin >> L >> R;
        cout << query(L , R) << "\n";
    }

    return 0;

}