제출 #1006722

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1006722		uma	Rice Hub (IOI11_ricehub)	C++14	컴파일 에러	0 ms	0 KiB

ricehub

#include "ricehub.h"
#include <iostream>
#include <vector>
#include <algorithm>


using namespace std;

typedef long long ll;

int besthub(int R, int L, int positions[], long long B){
    int n = R;

    int left = 0;
    
    int max_len = 0;
    vector<ll> prefix_vec(n,0);

    prefix_vec[0] = positions[0];

//calculating prefix sum
    for(int  i = 1; i < n; i++){
        prefix_vec[i] = prefix_vec[i-1] + positions[i];
    }

//sliding window concepts
    for(int right = 0; right < n; right++){
        int median = left + (right-left)/2;

        ll left_sum = median > 0 ? (prefix_vex[median - 1] - (left > 0)?prefix_vec[left-1]:0):0;
        ll left_cost = (ll)(median-left)*positions[median] - left_sum;
        ll right_cost = (prefix_vec[right] - prefix_vec[median]) - (ll)(right - median)*positions[median];

        int currentCost = left_cost + right_cost;

        while(currentCost > B && median >= left){
            left++;

            median = left + (right-left)/2;

            left_sum = median > 0 ? (prefix_vex[median - 1] - (left > 0)?prefix_vec[left-1]:0):0;
            left_cost = (ll)(median-left)*positions[median] - left_sum;
            right_cost = (prefix_vec[right] - prefix_vec[median]) - (ll)(right - median)*positions[median];
            
            currentCost = left_cost + right_cost;
        } 

        max_len = max(max_len,right-left+1);
    }

    return max_len;
}

컴파일 시 표준 에러 (stderr) 메시지

ricehub.cpp: In function 'int besthub(int, int, int*, long long int)':
ricehub.cpp:30:37: error: 'prefix_vex' was not declared in this scope; did you mean 'prefix_vec'?
   30 |         ll left_sum = median > 0 ? (prefix_vex[median - 1] - (left > 0)?prefix_vec[left-1]:0):0;
      |                                     ^~~~~~~~~~
      |                                     prefix_vec