Pagini recente » Cod sursa (job #1180279) | Cod sursa (job #2922425) | Cod sursa (job #1638316) | Cod sursa (job #1772533) | Cod sursa (job #3153181)
#include <fstream>
using namespace std;
const int INF = 1e8;
const int nmax=100001;
int rmq[18][nmax], lg[nmax], n, m;
void PrecRmq()
{
int x=lg[n];
for(int i=1; i<=x; 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))]);
//out<<rmq[i][j]<<" ";
}
//out<<"\n";
}
}
int QueryRmq(int a, int b)
{
int dif=(b-a+1);
int x=a, rez=INF;
int r;
if(a==b) return rmq[0][a];
while(dif!=0)
{
r=rmq[lg[dif]][x];
rez=min(rez, r);
//out<<dif<<" "<<lg[dif]<<" "<<r<<" "<<x<<"\n";
x+=(1<<lg[dif]);
dif=(b-x+1);
}
return rez;
}
int main()
{
ifstream in("rmq.in");
ofstream out("rmq.out");
for(int i=2; i<=nmax; i++)
lg[i]=lg[i/2]+1;
in>>n>>m;
for(int i=1; i<=n; i++)
{
in>>rmq[0][i];
}
PrecRmq();
int l, r;
for(int i=1; i<=m; i++)
{
in>>l>>r;
out<<QueryRmq(l, r)<<"\n";
}
}