Pagini recente » Cod sursa (job #1162903) | Cod sursa (job #2627201) | Cod sursa (job #1910962) | Cod sursa (job #3274323) | Cod sursa (job #3179172)
#include <iostream>
#include <fstream>
using namespace std;
#define MaxN 100000
#define LOG 17
int v[MaxN], a[MaxN][LOG], log[MaxN+1];
int n;
int f(int x, int y)
{
if(x<y) return x;
return y;
}
void build()
{
int i, p;
for(i=0; i<n; i++)
{
a[i][0]=v[i];
}
for(p=1; p<LOG; p++)
{
for(i=0; i+(1<<p)-1<n; i++)
{
a[i][p]=f(a[i][p-1], a[i+(1<<(p-1))][p-1]);
}
}
}
int query(int st, int dr)
{
int lung;
lung=dr-st+1;
return f(a[st][log[lung]], a[dr-(1<<log[lung])+1][log[lung]]);
}
int main()
{
ifstream in("rmq.in");
ofstream out("rmq.out");
int m, a, b, i;
in>>n>>m;
for(i=0; i<n; i++) in>>v[i];
log[1]=0;
for(i=2; i<=MaxN; i++)
{
log[i]=log[i/2]+1;
}
build();
for(i=0; i<m; i++)
{
in>>a>>b;
a--; b--;
out<<query(a, b)<<'\n';
}
return 0;
}