oj.uz

Submission #859827

# Submission time Handle Problem Language Result Execution time Memory
859827 2023-10-10T18:24:03 Z Andrei_Calota Password (RMI18_password) C++14
30 / 100
 405 ms 1268 KB 
#include <bits/stdc++.h>

using namespace std;
const int N_MAX = 5e3;
const int SIGMA_MAX = 26;

/**int query (string candidate) {
   cout << candidate << "\n";
   int ret; cin >> ret;
   return ret;
}**/

int query (string str);

string getCopy (int letter, int f) {
    string ret = "";
    for (int i = 0; i < f; i ++)
       ret = ret + char (letter + 'a');
    return ret;
}


int freq[SIGMA_MAX];
string guess (int n, int s) {

    int steps = 0;

    int present = 0;

    int N = n, SIGMA = s;
    string aux;
    for (int letter = 0; letter < SIGMA; letter ++) {
       aux = getCopy (letter, N);
       freq[letter] = query (aux);
       steps ++;
       if (freq[letter] > 0)
         present ++;
    }

    string done = "";
    for (int pos = N - 1; pos >= 0 && present > 1; pos --) {
       int left = 0, right = 1;
       while (right < SIGMA) {
          if (freq[left] == 0) {
            left ++;
            right = max (right, left + 1);
            continue;
          }
          if (freq[right] == 0) {
            right ++;
            continue;
          }

          aux = getCopy (left, freq[left]);
          aux = aux + char (right + 'a');
          aux = aux + done;

          int len = query (aux);
          steps ++;
          assert (steps <= 50000);

          if (len != N && len != (int) aux.size ())
            right ++;
          else if (len != N){
            left ++;
            right = max (left + 1, right);
          }
          else
            return aux;
       }
       done = char (left + 'a') + done;
       ///cout << "pana acum done este egal cu " << done << "\n";
       freq[left] --;
       if (freq[left] == 0)
         present --;
    }

    ///cout << "am termina in " << steps << "\n";

    int missing = 0;
    while (missing < SIGMA && freq[missing] == 0)
       missing ++;
    done = getCopy (missing, freq[missing]) + done;
    return done;

}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Guessed the password with 144 queries.
2 Correct 2 ms 344 KB Guessed the password with 370 queries.

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Guessed the password with 48 queries.
2 Correct 1 ms 436 KB Guessed the password with 149 queries.
3 Correct 1 ms 344 KB Guessed the password with 18 queries.
4 Correct 2 ms 344 KB Guessed the password with 319 queries.

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 764 KB Guessed the password with 12176 queries.
2 Correct 159 ms 1260 KB Guessed the password with 23017 queries.
3 Correct 299 ms 1268 KB Guessed the password with 28217 queries.
4 Incorrect 405 ms 524 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 144 queries.
2 Correct 2 ms 344 KB Guessed the password with 370 queries.
3 Correct 0 ms 344 KB Guessed the password with 48 queries.
4 Correct 1 ms 436 KB Guessed the password with 149 queries.
5 Correct 1 ms 344 KB Guessed the password with 18 queries.
6 Correct 2 ms 344 KB Guessed the password with 319 queries.
7 Correct 89 ms 764 KB Guessed the password with 12176 queries.
8 Correct 159 ms 1260 KB Guessed the password with 23017 queries.
9 Correct 299 ms 1268 KB Guessed the password with 28217 queries.
10 Incorrect 405 ms 524 KB Could not guess the password with 50000 queries.
11 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 144 queries.
2 Correct 2 ms 344 KB Guessed the password with 370 queries.
3 Correct 0 ms 344 KB Guessed the password with 48 queries.
4 Correct 1 ms 436 KB Guessed the password with 149 queries.
5 Correct 1 ms 344 KB Guessed the password with 18 queries.
6 Correct 2 ms 344 KB Guessed the password with 319 queries.
7 Correct 89 ms 764 KB Guessed the password with 12176 queries.
8 Correct 159 ms 1260 KB Guessed the password with 23017 queries.
9 Correct 299 ms 1268 KB Guessed the password with 28217 queries.
10 Incorrect 405 ms 524 KB Could not guess the password with 50000 queries.
11 Halted 0 ms 0 KB -