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Submission #901797

# Submission time Handle Problem Language Result Execution time Memory
901797 2024-01-10T02:29:08 Z omsincoconut Password (RMI18_password) C++17
10 / 100
 343 ms 944 KB 
#include <bits/stdc++.h>

using namespace std;

int query(string str);

inline void pushstr(string &q, string &s, int l, int r) {
    for (int i = l; i <= r; i++) q.push_back(s[i]);
}

inline void pushstr(string &q, char c, int n) {
    for (int i = 0; i < n; i++) q.push_back(c);
}

string guess(int n, int s) {
    string ret;
    int ct[s];
    for (char c = 'a'; c < 'a'+s; c++) {
        string q;
        pushstr(q, c, n);
        ct[c-'a'] = query(q);
    }
    for (char c = 'a'; c < 'a'+s; c++) {
        for (int i = 0; i <= ret.size(); i++) {
            int l = 0, r = ct[c-'a']+1;
            while (r-l > 1) {
                int mid = (l+r)/2;
                string q;
                pushstr(q, ret, 0, i-1);
                pushstr(q, c, mid);
                pushstr(q, ret, i, ret.size()-1);
                if (query(q) == q.size()) l = mid;
                else r = mid;
            }
            string nret;
            pushstr(nret, ret, 0, i-1);
            pushstr(nret, c, l);
            pushstr(nret, ret, i, ret.size()-1);
            ret = nret;
            ct[c-'a'] -= l;
        }
    }
    return ret;
};

Compilation message

password.cpp: In function 'std::string guess(int, int)':
password.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for (int i = 0; i <= ret.size(); i++) {
      |                         ~~^~~~~~~~~~~~~
password.cpp:32:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 if (query(q) == q.size()) l = mid;
      |                     ~~~~~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Guessed the password with 77 queries.
2 Correct 1 ms 344 KB Guessed the password with 188 queries.

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Guessed the password with 132 queries.
2 Correct 1 ms 344 KB Guessed the password with 265 queries.
3 Correct 0 ms 344 KB Guessed the password with 26 queries.
4 Runtime error 3 ms 428 KB Execution killed with signal 13
5 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 944 KB Guessed the password with 19539 queries.
2 Correct 268 ms 688 KB Guessed the password with 41488 queries.
3 Correct 329 ms 680 KB Guessed the password with 47056 queries.
4 Incorrect 343 ms 704 KB Could not guess the password with 50000 queries.
5 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Guessed the password with 77 queries.
2 Correct 1 ms 344 KB Guessed the password with 188 queries.
3 Correct 1 ms 344 KB Guessed the password with 132 queries.
4 Correct 1 ms 344 KB Guessed the password with 265 queries.
5 Correct 0 ms 344 KB Guessed the password with 26 queries.
6 Runtime error 3 ms 428 KB Execution killed with signal 13
7 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Guessed the password with 77 queries.
2 Correct 1 ms 344 KB Guessed the password with 188 queries.
3 Correct 1 ms 344 KB Guessed the password with 132 queries.
4 Correct 1 ms 344 KB Guessed the password with 265 queries.
5 Correct 0 ms 344 KB Guessed the password with 26 queries.
6 Runtime error 3 ms 428 KB Execution killed with signal 13
7 Halted 0 ms 0 KB -