Submission #1009883

#	Time	Username	Problem	Language	Result	Execution time	Memory
1009883		thangdz2k7	The Collection Game (BOI21_swaps)	C++17	100 / 100	4 ms	1572 KiB

swaps

#include <bits/stdc++.h>
#include "swaps.h"

using namespace std;

vector <int> ans;

void solve(int n, int v){
    for (int i = 1; i <= n; ++ i) ans.push_back(i);

    for (int t = 0; t < 9; ++ t){
        for (int k = t; k >= 0; -- k){
            vector <pair <int, int>> ask;
            for (int i = 0; i < n; ++ i){
                if (((i >> k) & 1) != (k - t != 0)) continue;
                if (i + (1 << k) >= n) continue;
                if ((i + (1 << k) >> (t + 1)) != (i >> (t + 1))) continue;
                schedule(ans[i], ans[i + (1 << k)]);
                ask.push_back({i, i + (1 << k)});
            }
            vector <int> res = visit();
            for (int i = 0; i < res.size(); ++ i){
                if (!res[i]) swap(ans[ask[i].first], ans[ask[i].second]);
            }
        }
    }

    answer(ans);
}

Compilation message (stderr)

swaps.cpp: In function 'void solve(int, int)':
swaps.cpp:17:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   17 |                 if ((i + (1 << k) >> (t + 1)) != (i >> (t + 1))) continue;
      |                      ~~^~~~~~~~~~
swaps.cpp:22:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |             for (int i = 0; i < res.size(); ++ i){
      |                             ~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3-1: 3 / 3
• Subtask 3-2: 2 / 2
• Subtask 4-1: 9 / 9
• Subtask 4-2: 6 / 6
• Subtask 5-1: 9 / 9
• Subtask 5-2: 6 / 6
• Subtask 6-1: 21 / 21
• Subtask 6-2: 14 / 14
• Subtask 7-1: 9 / 9
• Subtask 7-2: 6 / 6