Submission #421130

#	Time	Username	Problem	Language	Result	Execution time	Memory
421130		Sundavar	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	3 ms	464 KiB

messy

#include <bits/stdc++.h>

using namespace std;
void add_element(string s);
bool check_element(string s);
void compile_set();

int N;
void insert(int l, int r){
    string s(N, '1');
    for(int i = l; i < r; i++) s[i] = '0';
    int m = (l+r)/2;
    for(int i = l; i < m; i++) s[i] = '1', add_element(s), s[i] = '0';
    if(l != r-1)
        insert(l, m), insert(m, r);
}
vector<int> ans;
void revert(int l, int r, vector<int>& poss){
    if(l == r-1){
        ans[poss[0]] = l;
        return;
    }
    string s(N, '1');
    for(int& a : poss) s[a] = '0';
    vector<int> lef, rig;
    for(int& a : poss){
        s[a] = '1';
        if(check_element(s)) lef.push_back(a);
        else rig.push_back(a);
        s[a] = '0';
    }
    revert(l, (l+r)/2, lef), revert((l+r)/2, r, rig);
    
}
vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    insert(0,n);
    compile_set();
    ans.resize(n);
    vector<int> poss(n);
    for(int i = 0; i < n; i++) poss[i] = i;
    revert(0, n, poss);
    return ans;
}

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