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Submission #646323

# Submission time Handle Problem Language Result Execution time Memory
646323 2022-09-29T14:21:48 Z Matteo_Verz Password (RMI18_password) C++17
30 / 100
 83 ms 480 KB 
#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;
}

struct Compare {
    bool operator()(const string &a, const string &b) {
        return a.size() > b.size();
    }
};

string guess(int n, int s) {
    string ask;
    priority_queue <string, vector <string>, Compare> pq;

    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;
        pq.push(ask);
    }

    while (pq.size() > 1) {
        string a = pq.top();
        pq.pop();
        string b = pq.top();
        pq.pop();

        string c = mergeStrings(a, b);
        pq.push(c);
    }

    return pq.top();
}

Compilation message

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
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 67 queries.
2 Correct 1 ms 208 KB Guessed the password with 114 queries.

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 208 KB Guessed the password with 52 queries.
2 Runtime error 1 ms 296 KB Execution killed with signal 13
3 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 308 KB Guessed the password with 2763 queries.
2 Correct 35 ms 480 KB Guessed the password with 5078 queries.
3 Correct 44 ms 364 KB Guessed the password with 4595 queries.
4 Correct 83 ms 312 KB Guessed the password with 8147 queries.

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 67 queries.
2 Correct 1 ms 208 KB Guessed the password with 114 queries.
3 Correct 1 ms 208 KB Guessed the password with 52 queries.
4 Runtime error 1 ms 296 KB Execution killed with signal 13
5 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 208 KB Guessed the password with 67 queries.
2 Correct 1 ms 208 KB Guessed the password with 114 queries.
3 Correct 1 ms 208 KB Guessed the password with 52 queries.
4 Runtime error 1 ms 296 KB Execution killed with signal 13
5 Halted 0 ms 0 KB -