제출 #590248

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
590248		AlesL0	커다란 상품 (IOI17_prize)	C++17	컴파일 에러	0 ms	0 KiB

prize

#include <bits/stdc++.h>

using namespace std;

vector <bool> is_small;
int sum;
vector <int> val;
int sol = -1;

void binary_search(int m, int s, int e, int left, int right){
    if (sol != -1)return;
    vector <int> a = ask(m);
    if (a[0]+a[1] == 0)sol = m;
    //if (a[0]+a[1] < sum){is_small[m] = 1; return;}
    if (e-s <= 1)return;
    if (a[0]-left > 0)binary_search((s+m)/2, s, m, left, a[1]);
    if (a[1]-right > 0)binary_search((m+1+e)/2, m+1, e, a[0], right);
}

int find_best(int n){
    if (n == 1)return 0;
    is_small.resize(n, 0);
    val.resize(n);
    sum = 0;
    for (int i = 0; i <= min(600, n-1); i++){
        vector <int> a = ask(i);
        val[i] = a[0]+a[1];
        sum = max(sum, val[i]);
    }
    int start = -1;
    for (int i = 0; i < min(601, n); i++){
        //if (val[i] < sum)is_small[i] = 1;
        if (val[i] >= sum)start = i;
        if (val[i] == 0)return i;
    }
    binary_search(start, 0, n, 0, 0);
    return sol;
}

컴파일 시 표준 에러 (stderr) 메시지

prize.cpp: In function 'void binary_search(int, int, int, int, int)':
prize.cpp:12:22: error: 'ask' was not declared in this scope
   12 |     vector <int> a = ask(m);
      |                      ^~~
prize.cpp: In function 'int find_best(int)':
prize.cpp:26:26: error: 'ask' was not declared in this scope
   26 |         vector <int> a = ask(i);
      |                          ^~~