Submission #65960

#	Time	Username	Problem	Language	Result	Execution time	Memory
65960		gs13068	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	4 ms	512 KiB

messy

#include <vector>
#include <cstdio>
#include <string>
#include "messy.h"
 
using namespace std;
 
int N;
int R[128];
 
void push(int l, int r) {
    if (r - l == 1) return;
    string s(N, '0');
    int i;
    for (i = l; i < r; i++) s[i] = '1';
    for (i = l; i < (l + r >> 1); i++) {
        s[i] = '0';
        add_element(s);
        s[i] = '1';
    }
    push(l, l + r >> 1);
    push(l + r >> 1, r);
}
 
void pop(vector<int> a, int k) {
    if (a.size() == 1) {
        R[a[0]] = k;
        return;
    }
    string s(N, '0');
    vector<int> l, r;
    for (auto t : a) s[t] = '1';
    for (auto t : a) {
        s[t] = '0';
        if (check_element(s)) l.push_back(t);
        else r.push_back(t);
        s[t] = '1';
    }
    pop(l, k);
    pop(r, k | r.size());
}
 
std::vector<int> restore_permutation(int n, int w, int r) {
    vector<int> res;
    int i;
    N = n;
    push(0, n);
    compile_set();
    for (i = 0; i < n; i++) res.push_back(i);
    pop(res, 0);
    return vector<int>(R, R + n);
}

Compilation message (stderr)

messy.cpp: In function 'void push(int, int)':
messy.cpp:16:24: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     for (i = l; i < (l + r >> 1); i++) {
                      ~~^~~
messy.cpp:21:15: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     push(l, l + r >> 1);
             ~~^~~
messy.cpp:22:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
     push(l + r >> 1, r);
          ~~^~~

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