Submission #550050

#	Time	Username	Problem	Language	Result	Execution time	Memory
550050		ToroTN	A Difficult(y) Choice (BOI21_books)	C++14	10 / 100	1 ms	220 KiB

books

#include <bits/stdc++.h>

#include "books.h"

using namespace std;
//
// --- Sample implementation for the task books ---
//
// To compile this program with the sample grader, place:
//     books.h books_sample.cpp sample_grader.cpp
// in a single folder and run:
//     g++ books_sample.cpp sample_grader.cpp
// in this folder.
//
int n,m,s;
vector<pair<long long,int> > v;
long long a,num,qs[100005];
long long query(int l,int r)
{
    if(l==0)return qs[r];
    return qs[r]-qs[l-1];
}
void solve(int N, int K, long long A, int S) {
    // TODO implement this function
    n=N;
    m=K;
    a=A;
    s=S;
    num=a/m;
    int st=1,ed=n,md;
    while(ed>=st)
    {
        md=(st+ed)/2;
        long long val=skim(md);
        if(val>num)
        {
            ed=md-1;
        }else
        {
            st=md+1;
        }
    }
    //printf("%d %d %d\n",st,md,ed);
    for(int i=st-m-1;i<=st-1;i++)
    {
        if(i>=1&&i<=n)
        {
            v.push_back({skim(i),i});
        }
    }
    if(st>=1&&st<=n)
    {
        v.push_back({skim(st),st});
    }
    for(int i=st+1;i<=st+m+1;i++)
    {
        if(i>=1&&i<=n)
        {
            v.push_back({skim(i),i});
        }
    }
    qs[0]=v[0].first;
    for(int i=1;i<v.size();i++)
    {
        qs[i]=qs[i-1]+v[i].first;
    }
    for(int i=0;i<=v.size()-m;i++)
    {
        if(query(i,i+m-1)>=a&&query(i,i+m-1)<=2*a)
        {
            vector<int> ans;
            for(int j=i;j<=i+m-1;j++)
            {
                ans.push_back(v[j].second);
            }
            answer(ans);
        }
    }
    impossible();
}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:63:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i=1;i<v.size();i++)
      |                 ~^~~~~~~~~
books.cpp:67:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   67 |     for(int i=0;i<=v.size()-m;i++)
      |                 ~^~~~~~~~~~~~

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