Cod sursa(job #2625711)

Utilizator SirbuSirbu Ioan Sirbu Data 6 iunie 2020 09:10:21
Problema Range minimum query Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.93 kb
#include <bits/stdc++.h>

using namespace std;
ifstream fin ("rmq.in");
ofstream fout ("rmq.out");

long long RMQ [20][100002], v[100002];

int main () {

    int n, m;
    fin >> n >> m;
    for (int i = 1; i <= n; ++i)
        fin >> v[i];

    for (int i = 1; i <= n; ++i)
        RMQ[0][i] = v[i];

    for (int i = 1; (1 << i) <= n; ++i)
        for(int j = 1; j <= n - (1 << i) + 1 ; ++ j)
            if (RMQ[i-1][j] < RMQ[i-1][j + (1<< (i-1))])
                RMQ[i][j] = RMQ[i-1][j];
            else
                RMQ[i][j] = RMQ[i-1][j + (1<< (i-1))];
    for (int i = 1; i <= m; ++i) {
        int x, y, k;
        fin >> x >> y;
        k = y - x + 1;
        int log = 0;
        while(k > 1) {
            k = k/2;
            log++;
        }
        k = y - x + 1;
        int rez;
        rez = min(RMQ[log][x], RMQ[log][x + k - (1<<log)]);
        fout << rez << '\n';
    }

    return 0;
}