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September lunchtime 2020 #444

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September lunchtime 2020 #444

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35 changes: 35 additions & 0 deletions Codechef/SEPTLUNCH2020/SEPTLUNCH2.cpp
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Original file line number Diff line number Diff line change
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// september 2020 lunchtime PROBLEM-GCDOPS
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
int main() {

int t;
cin>>t;
while(t--)
{
int n;
cin>>n;
int b[n];
for(int i=0;i<n;i++)
{
cin>>b[i];
}
bool flag=true;
for(int i=0;i<n;i++)
{
if((i+1)%b[i]==0)
continue;
else{
flag=false;
break;
}
}
if(flag==true)
cout<<"YES"<<endl;
else
cout<<"NO"<<endl;

}
return 0;
}