Cod sursa(job #2901191)

Utilizator DafinaTrufasTrufas Dafina DafinaTrufas Data 13 mai 2022 11:48:53
Problema Range minimum query Scor 70
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.86 kb
#include <iostream>
#include <fstream>
using namespace std;

int a[100000], d[400000];

void creare(int nod, int st, int dr)
{
    if(st == dr)
    {
        d[nod] = a[st];
        return;
    }
    creare(nod * 2, st, (st + dr) / 2);
    creare(nod * 2 + 1, (st + dr) / 2 + 1, dr);
    d[nod] = min(d[nod * 2], d[nod * 2 + 1]);
}

int minim(int nod, int st, int dr, int i, int j)
{
    if(dr < i || st > j) return 1000000;
    if(i <= st && dr <= j) return d[nod];
    return min(minim(nod * 2, st, (st + dr) / 2, i, j), minim(nod * 2 + 1, (st + dr) / 2 + 1, dr, i, j));
}

int main()
{int n, m, i, x, y;
ifstream f("rmq.in");
ofstream g("rmq.out");
f >> n >> m;
for(i = 1; i <= n; i++)
    f >> a[i];
creare(1, 1, n);
for(i = 0; i < m; i++)
{
    f >> x >> y;
    g << minim(1, 1, n, x, y) << '\n';
}
f.close();
g.close();
return 0;
}