Spoj gopu and validity arrangement

#include<stdio.h>
int main(){
long long t,a,ar[200000],i,n,v;
scanf("%lld",&t);
while(t--){
v=0;
scanf("%lld",&n);
for(i=0;i<n;i++){
scanf("%lld",&ar[i]);
if(ar[i]>i){
v=1;
}
}
if(v==1){
printf("NO\n");
}else{
printf("YES\n");
}
}
return 0;
}