oj.uz

Submission #333352

# Submission time Handle Problem Language Result Execution time Memory
333352 2020-12-05T16:47:18 Z valerikk Password (RMI18_password) C++17
30 / 100
 959 ms 632 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 cur = "";
    string res = "";
    for (int i = 0; i < n; i++) {
        while (true) {
            bool was = false;
            for (char x = 'a'; x < 'a' + s; x++) {
                if (cur.size() == n) break;
                myinsert(cur, i, x);
                if (query(cur) == cur.size()) was = true; else myerase(cur, i);
            }
            if (!was) break;
        }
        res.push_back(cur[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:32:32: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |                 if (cur.size() == n) break;
      |                     ~~~~~~~~~~~^~~~
password.cpp:34:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                 if (query(cur) == cur.size()) was = true; else myerase(cur, i);
      |                     ~~~~~~~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 364 KB Guessed the password with 315 queries.
2 Correct 6 ms 384 KB Guessed the password with 712 queries.

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 364 KB Guessed the password with 171 queries.
2 Correct 4 ms 384 KB Guessed the password with 364 queries.
3 Correct 10 ms 364 KB Guessed the password with 530 queries.
4 Correct 6 ms 364 KB Guessed the password with 671 queries.

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 297 ms 492 KB Guessed the password with 19701 queries.
2 Correct 568 ms 632 KB Guessed the password with 33699 queries.
3 Correct 906 ms 620 KB Guessed the password with 45557 queries.
4 Incorrect 959 ms 364 KB Could not guess the password with 50000 queries.

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 364 KB Guessed the password with 315 queries.
2 Correct 6 ms 384 KB Guessed the password with 712 queries.
3 Correct 3 ms 364 KB Guessed the password with 171 queries.
4 Correct 4 ms 384 KB Guessed the password with 364 queries.
5 Correct 10 ms 364 KB Guessed the password with 530 queries.
6 Correct 6 ms 364 KB Guessed the password with 671 queries.
7 Correct 297 ms 492 KB Guessed the password with 19701 queries.
8 Correct 568 ms 632 KB Guessed the password with 33699 queries.
9 Correct 906 ms 620 KB Guessed the password with 45557 queries.
10 Incorrect 959 ms 364 KB Could not guess the password with 50000 queries.

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 364 KB Guessed the password with 315 queries.
2 Correct 6 ms 384 KB Guessed the password with 712 queries.
3 Correct 3 ms 364 KB Guessed the password with 171 queries.
4 Correct 4 ms 384 KB Guessed the password with 364 queries.
5 Correct 10 ms 364 KB Guessed the password with 530 queries.
6 Correct 6 ms 364 KB Guessed the password with 671 queries.
7 Correct 297 ms 492 KB Guessed the password with 19701 queries.
8 Correct 568 ms 632 KB Guessed the password with 33699 queries.
9 Correct 906 ms 620 KB Guessed the password with 45557 queries.
10 Incorrect 959 ms 364 KB Could not guess the password with 50000 queries.