Pagini recente » Cod sursa (job #881923) | Cod sursa (job #3242588) | Cod sursa (job #1943017) | Borderou de evaluare (job #1567684) | Cod sursa (job #1315492)
#include<fstream>
#define MAXN 100001
using namespace std;
ifstream fin("rmq.in");
ofstream fout("rmq.out");
int V[MAXN];
int rmq[18][MAXN], lg[18];
void buildrmq(int V[], int n) {
for(int i=2; i<=n; i++) {
lg[i] = lg[i/2] + 1;
}
for(int i=1; i<=n; i++) {
rmq[0][i] = V[i];
}
for(int i=1; i<=lg[n]; i++) {
for(int j=1; j<=n - (1<<i)+1; j++) {
rmq[i][j] = min(rmq[i-1][j], rmq[i-1][j+(1<<(i-1))]);
}
}
}
int ComputeRMQ(int b, int e) {
int len=e-b+1;
int i=lg[len];
return min(rmq[i][b],rmq[i][e - (1<<i) + 1]);
}
int main() {
int n, q, b, e;
fin>>n>>q;
for(int i=1; i<=n; i++) {
fin>>V[i];
}
buildrmq(V, n);
while(q--) {
fin>>b>>e;
fout<<ComputeRMQ(b, e)<<'\n';
}
}