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Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3), problem: (E) Prairie Partition Solution In C/C++

#include<bits/stdc++.h>
using namespace std;
int n;
long long a[100005];
int check(int x){
int i,j,res,ress,t,sum;
long long A,AA;
i=0;ress=0;
for(j=0;j<60;j++){
A=(1LL<<j);
res=0;
for(;i<n;i++){
if(a[i]==A){
res++;
}
else if(a[i]<A){
ress++;
}
else break;
}
if(ress>x) return 0;
if(x>res){
ress-=(x-res);
if(ress<0) ress=0;
x=res;
}
if(res>x) ress+=(res-x);
}
return 1;
}
int main(void){
int i,j,L,R,M,ans;
scanf(“%d”,&n);
L=0;R=0;
for(i=0;i<n;i++){
scanf(“%lld”,&a[i]);
if(a[i]==1) R++;
}
sort(a,a+n);
ans=R;
while(L<R){
M=(L+R)/2;
if(check(M)) R=M;
else L=M+1;
}
if(L==0||check(L)==0){
printf(“-1\n”);
return 0;
}
for(i=L;i<=ans;i++){
printf(“%d “,i);
}
printf(“\n”);
}

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