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 "books.h"
using namespace std;
long long a[100005];
// void solve(int N, int K, long long A, int S) {
// for(int i = 1; i <= K; i ++) a[i] = skim(i);
// int sm = 0;
// for(int i = 1; i <= K-1; i ++) sm += a[i];
// if(sm+a[K] > 2*A){
// impossible();
// return;
// }
// int low = K,high = N,mid,ans;
// while(low <= high){
// mid = (low+high)/2;
// if(skim(mid)+sm <= 2*A){
// ans = mid;
// low = mid+1;
// }
// else high = mid-1;
// }
// for(int i = ans; i > ans-K; i --){
// sm += skim(i);
// if(sm >= A){
// vector<int> bruh;
// for(int j = i; j <= ans; j++) bruh.push_back(j);
// for(int j = 1; j <= K-(int)bruh.size(); j ++) bruh.push_back(j);
// answer(bruh);
// return;
// }
// sm -= a[K-(ans-i)-1];
// }
// impossible();
// }
void solve(int N, int K, long long A, int S) {
for(int i = 1; i <= N; i ++) a[i] = skim(i);
long long sm = 0;
for(int i = 1; i <= K; i ++) sm += a[i];
if(sm > 2*A){
impossible();
return;
}
int low = K,high = N,mid,ans;
while(low <= high){
mid = (low+high)/2;
if(a[mid]+sm-a[K] <= 2*A){
ans = mid;
low = mid+1;
}
else high = mid-1;
}
int cur = K;
for(int i = ans; i > ans-K; i --){
sm -= a[cur];
sm += a[i];
cur--;
if(sm >= A){
vector<int> bruh;
for(int j = i; j <= ans; j++) bruh.push_back(j);
for(int j = 1; j <= cur; j ++) bruh.push_back(j);
sort(bruh.begin(),bruh.end());
assert(sm == a[bruh[0]]+a[bruh[1]]+a[bruh[2]]);
assert(sm <= 2*A);
answer(bruh);
return;
}
}
impossible();
}
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