This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "game.h"
using namespace std;
int rr,cc;
void init(int R,int C)
{
rr=R;
cc=C;
}
long long x,y;
long long p,q,u,v;
long long t[8000][8000];
long long query2(int i,int l,int r,int ql,int qr,int j)
{
if(ql>qr)return 0;
if(ql<=l&&r<=qr)return t[j][i];
int m=(l+r)/2;
long long lf=query2(i*2,l,m,ql,min(qr,m),j);
long long rt=query2(i*2+1,m+1,r,max(ql,m+1),qr,j);
if(lf==0)return rt;
if(rt==0)return lf;
return __gcd(rt,lf);
}
long long query1(int i,int l,int r,int ql,int qr)
{
if(ql>qr)return 0;
if(ql<=l&&r<=qr)return query2(1,0,cc-1,q,v,i);
int m=(l+r)/2;
long long lf=query1(i*2,l,m,ql,min(qr,m));
long long rt=query1(i*2+1,m+1,r,max(ql,m+1),qr);
if(lf==0)return rt;
if(rt==0)return lf;
return __gcd(lf,rt);
}
void upd2(int i,int l,int r,int j,long long val)
{
if(l==r)
{
t[j][i]=val;
return;
}
int m=(l+r)/2;
if(y<=m)upd2(i*2,l,m,j,val);
else upd2(i*2+1,m+1,r,j,val);
long long lf=t[j][i*2];
long long rt=t[j][i*2+1];
if(lf==0)t[j][i]=rt;
else if(rt==0)t[j][i]=lf;
else t[j][i]=__gcd(lf,rt);
}
void upd1(int i,int l,int r)
{
if(l==r)
{
upd2(1,0,cc-1,i,v);
return;
}
int m=(l+r)/2;
if(x<=m)upd1(i*2,l,m);
else upd1(i*2+1,m+1,r);
long long val1=query2(1,0,cc-1,y,y,i*2);
long long val2=query2(1,0,cc-1,y,y,i*2+1);
long long val;
if(val1==0)val=val2;
else if(val2==0)val=val1;
else val=__gcd(val1,val2);
upd2(1,0,cc-1,i,val);
}
void update(int X,int Y,long long V)
{
x=X;
y=Y;
v=V;
upd1(1,0,rr-1);
}
long long calculate(int P,int Q,int U,int V)
{
p=P;
q=Q;
u=U;
v=V;
return query1(1,0,rr-1,p,u);
}
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