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Cod sursa(job #975757)
#include<stdio.h>
#include<algorithm>
#define maxn 100005
#define lgn 20
using namespace std;
int n,m;
int v[maxn],lg[maxn];
int s[lgn][maxn];
void read()
{
scanf("%d%d",&n,&m);
for(int i=1;i<=n;i++) scanf("%d",&v[i]);
}
void preproc()
{
int i,j;
for(i=1;i<=n;i++) s[0][i]=v[i];
lg[1]=0;
for(i=2;i<=n;i++) lg[i]=lg[i/2]+1;
for(i=1;i<=lg[n];i++)
for(j=1;j<=n;j++)
s[i][j]=min(s[i-1][j],s[i-1][j+(1<<(i-1))]);
}
void solve()
{
int x,y,l,pw;
for(int i=1;i<=m;i++)
{
scanf("%d%d",&x,&y);
l=lg[y-x+1];
pw=1<<l;
printf("%d\n",min(s[l][x],s[l][y-pw+1]));
}
}
int main()
{
freopen("rmq.in","r",stdin);
freopen("rmq.out","w",stdout);
read();
preproc();
solve();
fclose(stdin);
fclose(stdout);
return 0;
}