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- #include <bits/stdc++.h>
- using namespace std;
- ifstream fin("divquery.in");
- ofstream fout("divquery.out");
- int cmmdc(int a, int b)
- {
- int r;
- while(b)
- {
- r=a%b;
- a=b;
- b=r;
- }
- return a;
- }
- int q,n,i,j,x,y,dif,l;
- int qr[18][100001];
- int lg[100001];
- int main()
- {
- fin>>n>>q;
- for(i=2;i<=n;i++)lg[i]=1+lg[i/2];
- for(i=1;i<=n;i++)fin>>qr[0][i];
- for(i=1;(1<<i)<=n;i++)
- for(j=1;j<=n-(1<<i)+1;j++)
- qr[i][j]=cmmdc(qr[i-1][j],qr[i-1][j+(1<<(i-1))]);
- while(q--)
- {
- fin>>x>>y;
- dif=y-x+1;
- l=lg[dif];
- dif=dif-(1<<l);
- fout<<cmmdc(qr[l][x],qr[l][x+dif])<<"\n";
- }
- return 0;
- }
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