Submission #553098

#	Time	Username	Problem	Language	Result	Execution time	Memory
553098		Vladth11	A Difficult(y) Choice (BOI21_books)	C++14	25 / 100	2 ms	288 KiB

books

#include <bits/stdc++.h>
#include "books.h"
#define debug(x) cerr << #x << " " << x << "\n"
#define debugs(x) cerr << #x << " " << x << " "
 
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <long double, pii> muchie;
 
const ll NMAX = 1000001;
const ll VMAX = 1001;
const ll INF = (1LL << 60);
const ll MOD = 1000000007;
const ll BLOCK = 447;
const ll base = 31;
const ll nr_of_bits = 21;
 
map <int, ll> mp;
 
ll afla(int i) {
    if(mp.find(i) != mp.end())
        return mp[i];
    return mp[i] = skim(i);
}
 
void solve(int N, int K, long long A, int S) {
    ll sum = 0;
    vector <int> first;
    for(int i = 1; i <= K; i++) {
        ll acum = afla(i);
        first.push_back(i);
        sum += acum;
    }
    if(sum > 2 * A) {
        impossible();
        return;
    }
    if(sum >= A && sum <= 2 * A) {
        answer(first);
        return;
    }
    reverse(first.begin(), first.end()); /// eliminam pe cel mai mic
    int r = 0, pas = (1 << nr_of_bits);
    while(pas) {
        if(r + pas <= N) {
            ll acum = afla(r + pas);
            if(acum <= A) {
                r += pas;
            }
        }
        pas /= 2;
    }
    vector <int> second;
    sum -= afla(first.back());
    first.pop_back();
    if(r < N && afla(r + 1) + sum >= A && afla(r + 1) + sum <= 2 * A) {
        first.push_back(r + 1);
        for(auto x : second)
            first.push_back(x);
        answer(first);
        return;
    }
  if(r < N)
    r++;
    sum += afla(r);
    second.push_back(r);
    int ini = r;
    r--;
    while(first.size()) {
        if(sum >= A && sum <= 2 * A) {
            for(auto x : second)
                first.push_back(x);
            answer(first);
            return;
        }
        sum -= afla(first.back());
        first.pop_back();
        sum += afla(r);
        second.push_back(r);
        r--;
    }
    if(sum >= A && sum <= 2 * A) {
        for(auto x : second)
            first.push_back(x);
        answer(first);
        return;
    }
    impossible();
}

Compilation message (stderr)

books.cpp: In function 'void solve(int, int, long long int, int)':
books.cpp:64:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   64 |   if(r < N)
      |   ^~
books.cpp:66:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   66 |     sum += afla(r);
      |     ^~~
books.cpp:68:9: warning: unused variable 'ini' [-Wunused-variable]
   68 |     int ini = r;
      |         ^~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20