oj.uz

Submission #464088

# Submission time Handle Problem Language Result Execution time Memory
464088 2021-08-12T11:08:39 Z Mamedov Password (RMI18_password) C++17
30 / 100
 519 ms 540 KB 
#pragma GCC optimize("Ofast")
#include <bits/stdc++.h>
#define ll long long
#define ui unsigned int
#define pii pair<int, int>
#define piii pair<int, pii>
#define pb push_back
#define f first
#define s second
#define oo (1ll << 60)

using namespace std;
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());


int query(string str);


string guess(int n, int s) {
    string str;
    vector<int>countLetter(s);
    int maxLetter = 0;
    for(int i = 0; i < s; ++i) {
        str = "";
        for(int j = 0; j < n; ++j) {
            str += ('a' + i);
        }
        countLetter[i] = query(str);
        if(countLetter[i] > countLetter[maxLetter]) {
            maxLetter = i;
        }
    }

    vector<int>pos;
    str = "";
    for(int i = 0; i < countLetter[maxLetter]; ++i) {
        str += ('a' + maxLetter);
        pos.pb(i);
    }
    pos.pb(str.length());

    for(int i = 0; i < s; ++i) {
        if(i == maxLetter) continue;
        for(int j = 0; j < countLetter[i]; ++j) {
            shuffle(pos.begin(), pos.end(), rng);
            for(int k = 0; k <= str.length(); ++k) {
                str.insert(str.begin() + pos[k], 'a' + i);
                if(query(str) == str.length()) {
                    pos.pb(str.length());
                    break;
                }
                str.erase(str.begin() + pos[k]);
            }
        }
    }
    return str;
}

Compilation message

password.cpp: In function 'std::string guess(int, int)':
password.cpp:46:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |             for(int k = 0; k <= str.length(); ++k) {
      |                            ~~^~~~~~~~~~~~~~~
password.cpp:48:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |                 if(query(str) == str.length()) {
      |                    ~~~~~~~~~~~^~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 200 KB Guessed the password with 93 queries.
2 Correct 3 ms 200 KB Guessed the password with 189 queries.

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 200 KB Guessed the password with 97 queries.
2 Correct 5 ms 200 KB Guessed the password with 238 queries.
3 Correct 3 ms 200 KB Guessed the password with 162 queries.
4 Correct 5 ms 200 KB Guessed the password with 451 queries.

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 151 ms 540 KB Guessed the password with 18367 queries.
2 Correct 519 ms 432 KB Guessed the password with 45971 queries.
3 Correct 315 ms 424 KB Guessed the password with 41814 queries.
4 Incorrect 473 ms 324 KB Could not guess the password with 50000 queries.

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 200 KB Guessed the password with 93 queries.
2 Correct 3 ms 200 KB Guessed the password with 189 queries.
3 Correct 1 ms 200 KB Guessed the password with 97 queries.
4 Correct 5 ms 200 KB Guessed the password with 238 queries.
5 Correct 3 ms 200 KB Guessed the password with 162 queries.
6 Correct 5 ms 200 KB Guessed the password with 451 queries.
7 Correct 151 ms 540 KB Guessed the password with 18367 queries.
8 Correct 519 ms 432 KB Guessed the password with 45971 queries.
9 Correct 315 ms 424 KB Guessed the password with 41814 queries.
10 Incorrect 473 ms 324 KB Could not guess the password with 50000 queries.

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 200 KB Guessed the password with 93 queries.
2 Correct 3 ms 200 KB Guessed the password with 189 queries.
3 Correct 1 ms 200 KB Guessed the password with 97 queries.
4 Correct 5 ms 200 KB Guessed the password with 238 queries.
5 Correct 3 ms 200 KB Guessed the password with 162 queries.
6 Correct 5 ms 200 KB Guessed the password with 451 queries.
7 Correct 151 ms 540 KB Guessed the password with 18367 queries.
8 Correct 519 ms 432 KB Guessed the password with 45971 queries.
9 Correct 315 ms 424 KB Guessed the password with 41814 queries.
10 Incorrect 473 ms 324 KB Could not guess the password with 50000 queries.