Pagini recente » Pirati | Profil AlexandruPaul | Istoria paginii utilizator/vlad.ulmeanu30 | Kpal | Cod sursa (job #3286746)
#include <fstream>
using namespace std;
ifstream in("rmq.in");
ofstream out("rmq.out");
int n, q;
int v[100005];
int segtree[400005];
void build(int node, int left, int right)
{
if(left == right)
{
segtree[node] = v[left];
}
else
{
int mij = (left + right) / 2;
build(2*node, left, mij);
build(2*node+1, mij + 1, right);
segtree[node] = min(segtree[2*node], segtree[2*node+1]);
}
}
int query(int node, int left, int right, int qleft, int qright)
{
if(qleft <= left && right <= qright)
{
return segtree[node];
}
else
{
int mij = (left + right) / 2;
if(qright <= mij)
{
return query(2*node, left, mij, qleft, qright);
}
else if(mij + 1 <= qleft)
{
return query(2*node+1, mij + 1, right, qleft, qright);
}
else
{
return min(query(2*node, left, mij, qleft, qright), query(2*node+1, mij + 1, right, qleft, qright));
}
}
}
int main()
{
in>>n>>q;
for(int i = 1; i<=n; i++)
{
in>>v[i];
}
build(1, 1, n);
int st, dr;
while(q--)
{
in>>st>>dr;
out<<query(1, 1, n, st, dr)<<'\n';
}
return 0;
}