Cod sursa(job #3305287)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 31 iulie 2025 14:48:41
Problema Range minimum query Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.73 kb
#include <bits/stdc++.h>
using namespace std;

const int NMAX = 1e5;
int a[NMAX + 1], rmq[NMAX + 1][17];

int query(int x, int y) {
    int p = log2(y - x + 1);
    return min(rmq[x][p], rmq[y - (1 << p) + 1][p]);
}

int main() {
    ifstream cin("rmq.in");
    ofstream cout("rmq.out");
    int n, q;
    cin >> n >> q;
    for(int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    for(int i = 1; i <= n; i++) {
        rmq[i][0] = a[i];
    }
    for(int j = 1; j <= log2(n); j++) {
        for(int i = 1; i <= n - (1 << j) + 1; i++) {
            rmq[i][j] = min(rmq[i][j - 1], rmq[i + (1 << (j - 1))][j - 1]);
        }
    }
    while(q--) {
        int x, y;
        cin >> x >> y;
        cout << query(x, y) << '\n';
    }
    return 0;
}