Submission #723316

#	Time	Username	Problem	Language	Result	Execution time	Memory
723316		Marduk	A Difficult(y) Choice (BOI21_books)	C++14	Compilation error	0 ms	0 KiB

books

#include <bits/stdc++.h>
using namespace std;

void solve(int N, int K, long long A, int S){
    vector<int> sol;

    int lo = 0, hi = N+1;
    while(hi-lo>1){
        int mid = (lo+hi)/2;

        if(skim(mid) >= A) hi = mid;
        else lo = mid;
    }

    int x = hi;
    int vx = skim(x);

    long long ans = 0;
    vector<int> f,l;
    f.clear(); l.clear();

    for(int i = 1;i<K;i++){
        long long q = skim(i);
        ans+=q; f.push_back(q);

        q = skim(x-i);
        l.push_back(q);
    }

    if(ans+vx >= A && ans+vx <= 2*A){
        for(int i = 1;i<K;i++) sol.push_back(i);
        sol.push_back(x);
        answer(sol); return;
    }

    if(K>=x) impossible();

    f.push_back(skim(K));
    ans+=f[K-1];

    if(ans >= A && ans <= 2*A){
        for(int i = 1;i<=K;i++) sol.push_back(i);
        answer(sol); return;
    }

    for(int i = 0;i<K;i++){
        if(f[i] == l[i]) impossible();
        ans-=f[i]; ans+=l[i];

        if(ans >= A && ans <= 2*A){
            for(int j = 1+i+1;j<=K;j++) sol.push_back(j);
            for(int j = x-1;j>=x-1-i;j--) sol.push_back(j);
            answer(sol); return;
        }
    }
    impossible();
}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:11:12: error: 'skim' was not declared in this scope
   11 |         if(skim(mid) >= A) hi = mid;
      |            ^~~~
books.cpp:16:14: error: 'skim' was not declared in this scope
   16 |     int vx = skim(x);
      |              ^~~~
books.cpp:33:9: error: 'answer' was not declared in this scope
   33 |         answer(sol); return;
      |         ^~~~~~
books.cpp:36:14: error: 'impossible' was not declared in this scope
   36 |     if(K>=x) impossible();
      |              ^~~~~~~~~~
books.cpp:43:9: error: 'answer' was not declared in this scope
   43 |         answer(sol); return;
      |         ^~~~~~
books.cpp:47:26: error: 'impossible' was not declared in this scope
   47 |         if(f[i] == l[i]) impossible();
      |                          ^~~~~~~~~~
books.cpp:53:13: error: 'answer' was not declared in this scope
   53 |             answer(sol); return;
      |             ^~~~~~
books.cpp:56:5: error: 'impossible' was not declared in this scope
   56 |     impossible();
      |     ^~~~~~~~~~