Submission #646264

#	Time	Username	Problem	Language	Result	Execution time	Memory
646264		Matteo_Verz	Password (RMI18_password)	C++17	50 / 100	377 ms	492 KiB

password

#include <bits/stdc++.h>
#ifdef BLAT
    #include "debug/debug.hpp"
#else
    #define debug(x...)
#endif

using namespace std;

int query(string s);

string mergeStrings(string &a, string &b) {
    string mergedSoFar, queryString;
    while (a.size() || b.size()) {
        if (!a.size()) {
            mergedSoFar += b;
            return mergedSoFar;
        }

        queryString = mergedSoFar + a[0] + b;
        int len = query(queryString);
        
        if (len == queryString.size()) {
            mergedSoFar.push_back(a[0]);
            a.erase(0, 1);
        } else {
            mergedSoFar.push_back(b[0]);
            b.erase(0, 1);
        }
    }

    return mergedSoFar;
}

string guess(int n, int s) {
    string ask;
    vector <string> vs;

    for (char ch = 'a'; ch - 'a' < s; ch++) {
        ask.clear();
        for (int i = 0; i < n; i++)
            ask += ch;
        int len = query(ask);

        ask = "";
        for (int i = 0; i < len; i++)
            ask += ch;
        vs.push_back(ask);
    }

    while (vs.size() > 1) {
        string a = vs.back();
        vs.pop_back();
        string b = vs.back();
        vs.pop_back();

        string c = mergeStrings(a, b);
        vs.push_back(c);
    }

    return vs[0];
}

Compilation message (stderr)

password.cpp: In function 'std::string mergeStrings(std::string&, std::string&)':
password.cpp:23:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   23 |         if (len == queryString.size()) {
      |             ~~~~^~~~~~~~~~~~~~~~~~~~~

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