Submission #772786

#	Time	Username	Problem	Language	Result	Execution time	Memory
772786		ZHIRDILBILDIZ	A Difficult(y) Choice (BOI21_books)	C++14	Compilation error	0 ms	0 KiB

books

#include<bits/stdc++.h>
//#include"books.h"
#define ll long long
#define fi first
#define se second
using namespace std ;
//void impossible()
//{
//    cout << "-1\n" ;
//    exit(0) ;
//}
//void answer(vector<int> ans)
//{
//    for(int i : ans)
//        cout << i << ' ' ;
//    exit(0) ;
//}
//ll skim(int ind)
//{
//    cout << "? " << ind << '\n' ;
//    return ind ;
//}
void solve(int n, int k, ll a, int s)
{
    vector<int> ans ;
    ll x[n + 1] = {}, pref[n + 1] = {} ;
    for(int i = 1 ; i <= k ; i++)
    {
        x[i] = skim(i) ;
        pref[i] = pref[i - 1] + x[i] ;
    }
    if(pref[k] > 2ll * a)
        impossible() ;
    if(a <= pref[k] && pref[k] <= 2ll * a)
    {
        for(int i = 1 ; i <= k ; i++)
            ans.push_back(i) ;
        answer(ans) ;
    }
    if(s >= n)
    {
        for(int i = k + 1 ; i <= n ; i++)
        {
            x[i] = skim(i) ;
            pref[i] = pref[i - 1] + x[i] ;
        }
        for(int i = 1 ; i <= n ; i++)
            if(x[i] >= a && pref[k - 1] + x[i] <= 2ll * a)
            {
                for(int j = 1 ; j < k ; j++)
                    ans.push_back(j) ;
                ans.push_back(i) ;
                answer(ans) ;
            }
        for(int i = k ; i <= n ; i++)
            if(a <= pref[i] - pref[i - k] && pref[i] - pref[i - k] <= 2ll * a)
            {
                for(int j = i - k + 1 ; j <= i ; j++)
                    ans.push_back(j) ;
                answer(ans) ;
            }
        impossible() ;
    }
    ll l = 0, r = n + 1 ;
    while(l + 1 < r)
    {
        int mid = (l + r) >> 1 ;
        ll num = x[mid] ;
        if(!num)
        {
            num = skim(mid) ;
            x[mid] = num ;
        }
        if(num < a)l = mid ;
        else r = mid ;
    }
    if(r != n + 1 && x[r] + pref[k - 1] <= 2ll * a)
    {
        for(int i = 1 ; i < k ; i++)
            ans.push_back(i) ;
        ans.push_back(r) ;
        answer(ans) ;
    }
    l = 0, r = n - k + 1 ;
    vector<pair<ll, int>> w, ls ;
    while(l + 1 < r)
    {
        w.clear() ;
        ll mid = (l + r) >> 1, sum = 0 ;
        for(int i = mid ; i < mid + k ; i++)
        {
            ll num = x[i] ;
            if(!num)num = skim(i) ;
            sum += num ;
            w.push_back({num, i}) ;
        }
        if(sum > 2 * a)r = mid ;
        else
        {
            ls = w ;
            ans.clear() ;
            for(auto i : w)
                ans.push_back(i.se) ;
            l = mid ;
        }
    }
    ll sum = 0 ;
    for(auto i : ls)
        sum += i.fi ;
    if(a <= sum && sum <= 2 * a)
        answer(ans) ;
    else
        impossible() ;
}
//signed main()
//{
//    int n, k, a, s ;
//    cin >> n >> k >> a >> s ;
//    solve(n, k, a, s) ;
//    return 0 ;
//}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:29:16: error: 'skim' was not declared in this scope
   29 |         x[i] = skim(i) ;
      |                ^~~~
books.cpp:33:9: error: 'impossible' was not declared in this scope
   33 |         impossible() ;
      |         ^~~~~~~~~~
books.cpp:38:9: error: 'answer' was not declared in this scope
   38 |         answer(ans) ;
      |         ^~~~~~
books.cpp:44:20: error: 'skim' was not declared in this scope
   44 |             x[i] = skim(i) ;
      |                    ^~~~
books.cpp:53:17: error: 'answer' was not declared in this scope
   53 |                 answer(ans) ;
      |                 ^~~~~~
books.cpp:60:17: error: 'answer' was not declared in this scope
   60 |                 answer(ans) ;
      |                 ^~~~~~
books.cpp:62:9: error: 'impossible' was not declared in this scope
   62 |         impossible() ;
      |         ^~~~~~~~~~
books.cpp:71:19: error: 'skim' was not declared in this scope
   71 |             num = skim(mid) ;
      |                   ^~~~
books.cpp:82:9: error: 'answer' was not declared in this scope
   82 |         answer(ans) ;
      |         ^~~~~~
books.cpp:93:27: error: 'skim' was not declared in this scope
   93 |             if(!num)num = skim(i) ;
      |                           ^~~~
books.cpp:111:9: error: 'answer' was not declared in this scope
  111 |         answer(ans) ;
      |         ^~~~~~
books.cpp:113:9: error: 'impossible' was not declared in this scope
  113 |         impossible() ;
      |         ^~~~~~~~~~