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Submission #333353

# Submission time Handle Problem Language Result Execution time Memory
333353 2020-12-05T16:52:35 Z valerikk Password (RMI18_password) C++17
10 / 100
 125 ms 644 KB 
#include <bits/stdc++.h>
using namespace std;

int query(string str);

void myinsert(string &str, int pos, char x) {
    string s = "";
    for (int i = 0; i <= str.size(); i++) {
        if (i < pos) s.push_back(str[i]); else {
            if (i == pos) s.push_back(x); else s.push_back(str[i - 1]);
        }
    }
    str = s;
}

void myerase(string &str, int pos) {
    string s = "";
    for (int i = 0; i < str.size(); i++) {
        if (i == pos) continue;
        s.push_back(str[i]);
    }
    str = s;
}

string guess(int n, int s) {
    string res = "";
    for (int i = 0; i < n; i++) {
        for (char x = 'a'; x < 'a' + s; x++) {
            if (res.size() < n) {
                myinsert(res, i, x);
                if (query(res) != res.size()) myerase(res, i);
            }
        }
    }
    return res;
}

Compilation message

password.cpp: In function 'void myinsert(std::string&, int, char)':
password.cpp:8:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i = 0; i <= str.size(); i++) {
      |                     ~~^~~~~~~~~~~~~
password.cpp: In function 'void myerase(std::string&, int)':
password.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     for (int i = 0; i < str.size(); i++) {
      |                     ~~^~~~~~~~~~~~
password.cpp: In function 'std::string guess(int, int)':
password.cpp:29:28: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   29 |             if (res.size() < n) {
      |                 ~~~~~~~~~~~^~~
password.cpp:31:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |                 if (query(res) != res.size()) myerase(res, i);
      |                     ~~~~~~~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Guessed the password with 210 queries.
2 Correct 5 ms 364 KB Guessed the password with 482 queries.

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 2 ms 364 KB Execution killed with signal 13 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Runtime error 125 ms 644 KB Execution killed with signal 13 (could be triggered by violating memory limits)
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Guessed the password with 210 queries.
2 Correct 5 ms 364 KB Guessed the password with 482 queries.
3 Runtime error 2 ms 364 KB Execution killed with signal 13 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Guessed the password with 210 queries.
2 Correct 5 ms 364 KB Guessed the password with 482 queries.
3 Runtime error 2 ms 364 KB Execution killed with signal 13 (could be triggered by violating memory limits)
4 Halted 0 ms 0 KB -