Submission #575397

#	Time	Username	Problem	Language	Result	Execution time	Memory
575397		Uzouf	A Difficult(y) Choice (BOI21_books)	C++14	0 / 100	3 ms	592 KiB

books

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
#include"books.h"
using namespace std;
//using namespace __gnu_pbds;
//#define ll long long
//#define endl "\n"
//int mod=1e9+7;
//const int N=2e5+5;
//template<class x>
//using ordered_multiset = tree<x, null_type,less_equal<x>, rb_tree_tag,tree_order_statistics_node_update>;


void solve(int N, int K, long long A, int S) {
  vector<int> v(N);
    for (int i=0;i<N;i++) {
      v[i]=skim(i+1);
    }
    long long na=A*2;
    int  a=-1,b=-1,c=-1;
    for (int l=0;l<N;l++) {
      for (int r=l+2;r<N;r++) {
        long long need=na-(v[l]+v[r]);
        int ll=l+1,rr=r-1;
        int mid=upper_bound(v.begin()+ll,v.begin()+rr+1,need)-v.begin();
        mid--;
        //cout<<a<<' '<<r<<' '<<mid<<endl;
        if (mid>rr || mid<ll) continue;
        long long chk=v[mid]+v[l]+v[r];
        if (chk>=A && chk<=na) {
          a=l+1; b=mid+1; c=r+1; break;
        }
      }
    }

    if (a==-1) impossible();
    vector<int> ans;
    ans.push_back(a); ans.push_back(b); ans.push_back(c);
    //cout<<a<<' '<<b<<' '<<c;
    answer(ans);
    return;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20