Submission #709737

#	Time	Username	Problem	Language	Result	Execution time	Memory
709737		siewjh	Password (RMI18_password)	C++17	100 / 100	245 ms	688 KiB

password

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

int query(string q);

string chain(char ch, int x){
    string str = "";
    for (int i = 0; i < x; i++) str += ch;
    return str;
}

string guess(int n, int s){
    priority_queue<pair<int, string>> pq;
    for (int i = 0; i < s; i++){
        char ch = 'a' + i;
        int amt = query(chain(ch, n));
        pq.push({-amt, chain(ch, amt)});
    }
    while (pq.size() >= 2){
        string s1, s2;
        s1 = pq.top().second; pq.pop();
        s2 = pq.top().second; pq.pop();
        string mrg = "";
        while (!s1.empty() && !s2.empty()){
            if (query(mrg + s1[0] + s2) == mrg.size() + 1 + s2.size()){
                mrg += s1[0];
                s1.erase(0, 1);
            }
            else{
                mrg += s2[0];
                s2.erase(0, 1);
            }
        }
        if (!s1.empty()) mrg += s1;
        else mrg += s2;
        pq.push({-mrg.size(), mrg});
    }
    return pq.top().second;
}

Compilation message (stderr)

password.cpp: In function 'std::string guess(int, int)':
password.cpp:25:41: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |             if (query(mrg + s1[0] + s2) == mrg.size() + 1 + s2.size()){
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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