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Cod sursa(job #748902)
//Include
#include <cstdio>
#include <algorithm>
using namespace std;
//Definitii
#define leftSon (node<<1)
#define rightSon (node<<1)+1
//Constante
const int TREE_SIZE = (int)4e5+1;
const int oo = (1<<30) - 1;
//Functii
void update(int node, int left, int right);
void query(int node, int left, int right);
//Variabile
int elements, questions;
int position, value;
int leftRange, rightRange;
int minValue;
int tree[TREE_SIZE];
//Main
int main()
{
freopen("rmq.in", "rt", stdin);
freopen("rmq.out", "wt", stdout);
scanf("%d%d", &elements, &questions);
for(position=1 ; position<=elements ; ++position)
{
scanf("%d", &value);
update(1, 1, elements);
}
while(questions--)
{
minValue = oo;
scanf("%d%d", &leftRange, &rightRange);
query(1, 1, elements);
printf("%d ", minValue);
}
fclose(stdin);
fclose(stdout);
return 0;
}
void update(int node, int left, int right)
{
if(left == right)
{
tree[node] = value;
return ;
}
int mid = (left+right)>>1;
if(position <= mid)
update(leftSon, left, mid);
else
update(rightSon, mid+1, right);
tree[node] = min(tree[leftSon], tree[rightSon]);
}
void query(int node, int left, int right)
{
if(leftRange <= left && right <= rightRange)
{
minValue = min(minValue, tree[node]);
return ;
}
int mid = (left+right)>>1;
if(leftRange <= mid)
query(leftSon, left, mid);
if(mid < rightRange)
query(rightSon, mid+1, right);
}