Pagini recente » Cod sursa (job #2784402) | Cod sursa (job #617611) | Cod sursa (job #2662131) | Cod sursa (job #183183) | Cod sursa (job #967224)
Cod sursa(job #967224)
#include <fstream>
using namespace std;
ifstream fin("arbint.in");
ofstream fout ("arbint.out");
int t[1<<18],a,b,s;
void update (int nod, int st, int dr)
{
if (st==dr) t[nod]=b;
else
{
int m=(st+dr)>>1;
if (a<=m)
update (nod<<1,st,m);
else
update ((nod<<1)+1,m+1,dr);
t[nod] = max (t[nod<<1],t[(nod<<1)+1]);
}
}
void query (int nod, int st, int dr)
{
if (st<a||b<dr)
{
int m=(st+dr)>>1;
int x=0,y=0;
if (a<=m) query(nod<<1,st,m);
if (b>m) query ((nod<<1)+1,m+1,dr);
if (x<y) x=y;
}
else s=max(s,t[nod]);
}
int main()
{
int n,m,i,x; bool op;
fin>>n>>m;
for (a=1;a<=n;a++) {fin>>b; update (1,1,n);}
for (i=1;i<=m;i++)
{
fin>>op>>a>>b;
if (op==0)
{s=0;
query(1,1,n);
fout<<s<<"\n";}
else update (1,1,n);
}
return 0;
}