Submission #865425

#	Time	Username	Problem	Language	Result	Execution time	Memory
865425		Alebn	A Difficult(y) Choice (BOI21_books)	C++14	0 / 100	4 ms	1228 KiB

books

#include <iostream>
#include <vector>
#include "books.h"
 
#define ll long long
#define ull unsigned long long
 
using namespace std;
 
void solve(int n, int k, ll A, int S) {
    vector<ull> a(n);
    bool ok = false;
    ull sum = 0;
    int mid = -1;
    for(int i = 0; i < n; i++) {
        a[i] = skim(i+1);
        if(a[i] >= A && mid == -1) mid = i; 
    }
    for(int i = 0; i < k-1; i++) sum+=a[i];
    mid = max(mid, k-1);
    for(int i = mid; i > k-2; i--) {
        if(sum+a[i] >= A && sum+a[i] <= 2*A) {
            vector<int> b(k);
            for(int j = 0; j < k-1; j++) b[j] = j+1;
            b[k-1] = i+1;
            answer(b);
            return;
            ok = true;
        }
    }
    if(!ok) impossible();
}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:17:17: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long unsigned int>, long long unsigned int>::value_type' {aka 'long long unsigned int'} and 'long long int' [-Wsign-compare]
   17 |         if(a[i] >= A && mid == -1) mid = i;
books.cpp:22:21: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   22 |         if(sum+a[i] >= A && sum+a[i] <= 2*A) {
      |            ~~~~~~~~~^~~~
books.cpp:22:38: warning: comparison of integer expressions of different signedness: 'long long unsigned int' and 'long long int' [-Wsign-compare]
   22 |         if(sum+a[i] >= A && sum+a[i] <= 2*A) {
      |                             ~~~~~~~~~^~~~~~

• 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