Submission #731635

#	Time	Username	Problem	Language	Result	Execution time	Memory
731635		vjudge1	Unscrambling a Messy Bug (IOI16_messy)	C++11	100 / 100	3 ms	468 KiB

messy

#include "messy.h"

#include <bits/stdc++.h>

#include <vector>
using namespace std;

std::vector<int> restore_permutation(int n, int w, int r) {
        function<void(int, int)> prep = [&](int l, int r) {
                // [l, r)
                if (l + 1 == r) return;
                string base(n, '0');
                for (int i = 0; i < l; i++) base[i] = '1';
                for (int i = r; i < n; i++) base[i] = '1';
                int m = l + r >> 1;
                for (int i = l; i < m; i++) {
                        string tmp = base;
                        tmp[i] = '1';
                        add_element(tmp);
                }
                prep(l, m);
                prep(m, r);
        };
        vector<int> ans(n);
        function<void(int, int, vector<int>)> guess = [&](int l, int r, vector<int> candidates) {
                // [l, r)
                if (l + 1 == r) return void(ans[candidates[0]] = l);
                string base(n, '1');
                for (int i : candidates) base[i] = '0';
                vector<int> cl, cr;
                for (int i : candidates) {
                        string tmp = base;
                        tmp[i] = '1';
                        vector<int>& which = check_element(tmp) ? cl : cr;
                        which.emplace_back(i);
                }
                int m = l + r >> 1;
                guess(l, m, cl);
                guess(m, r, cr);
        };
        prep(0, n);
        compile_set();
        vector<int> id(n);
        iota(id.begin(), id.end(), 0);
        guess(0, n, id);
        return ans;
}

Compilation message (stderr)

messy.cpp: In lambda function:
messy.cpp:15:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   15 |                 int m = l + r >> 1;
      |                         ~~^~~
messy.cpp: In lambda function:
messy.cpp:37:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   37 |                 int m = l + r >> 1;
      |                         ~~^~~

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30