Submission #201145

#	Time	Username	Problem	Language	Result	Execution time	Memory
201145		Atill83	Password (RMI18_password)	C++14	50 / 100	3057 ms	636 KiB

password

#include <bits/stdc++.h>
using namespace std;

int query(string str);

int freq[30];

string solve(int l, int r){
    if(l == r){
        string a;
        for(int i = 0; i < freq[l]; i++) a += (char)('a' + l);
        return a;
    }
    int m = (l + r) / 2;
    string a = solve(l, m), b = solve(m + 1, r);

    string ans;
    reverse(a.begin(), a.end());
    reverse(b.begin(), b.end());
    while(a.length() && b.length()){
        string soru = ans + a.back();
        for(auto i = b.rbegin(); i < b.rend(); i++) soru = soru + (*i);
        int quer = query(soru);
        if(quer == soru.length()){
            ans += a.back();
            a.pop_back();
        }else{
            ans += b.back();
            b.pop_back();
        }
    }
    while(a.length()){
        ans += a.back();
        a.pop_back();
    }
    while(b.length()){
        ans += b.back();
        b.pop_back();
    }

    return ans;
}


string guess(int n, int s){
    int sum = 0;
    for(int i = 0; i < s - 1; i ++){
        string que;
        for(int j = 0; j < n; j++)
            que += (char)('a' + i);
        freq[i] = query(que);
        sum += freq[i];
    }
    freq[s - 1] = n - sum;
    return solve(0, s - 1);
}

Compilation message (stderr)

password.cpp: In function 'std::__cxx11::string solve(int, int)':
password.cpp:24:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(quer == soru.length()){
            ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20