oj.uz

Submission #286948

# Submission time Handle Problem Language Result Execution time Memory
286948 2020-08-31T07:45:50 Z crossing0ver Password (RMI18_password) C++17
30 / 100
 480 ms 416 KB 
#include<bits/stdc++.h>
#define ll long long
#define pb push_back
#define pii pair<int,int>
#define vi vector<int>
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
using namespace std;

int m;
string suf,pref;
int query(string str);
string guess(int n, int s) {
	string pref,P;
	for (int i = 1; i <= n; i++) {
		int len = suf.size() + pref.size();
		char LAST = ((int)pref.size() ? pref.back() : 'a');
		int cur = len;
		for (int z = 1; z + pref.size() + suf.size() <= n;) {
			bool flag = 0;
		for (char c = 'a'; c < 'a' + s; c++) {
			P = pref + c;
			P += suf;
			int F = query(P);
			if (F > cur) {
				LAST = c;
				pref += c;
				cur = F;
				flag  = 1;
				break;
			}
		}
		if (flag == 0) break;
		}
		reverse(all(suf));
		if (pref.size())
		suf+=pref.back();
		reverse(all(suf));
		if (pref.size())
		pref.pop_back();
		if (pref.size() + suf.size() == n) {
			pref += suf;
			int Z = query(pref);
			if (Z != n) {
				return "BB";
				while(true) {
					
				}
			}
			return pref;
		}
	}
	return suf;
}
/*
main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

}*/

Compilation message

password.cpp: In function 'std::string guess(int, int)':
password.cpp:20:48: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |   for (int z = 1; z + pref.size() + suf.size() <= n;) {
      |                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
password.cpp:42:32: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |   if (pref.size() + suf.size() == n) {
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~^~~~
password.cpp:18:8: warning: variable 'LAST' set but not used [-Wunused-but-set-variable]
   18 |   char LAST = ((int)pref.size() ? pref.back() : 'a');
      |        ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Guessed the password with 330 queries.
2 Correct 8 ms 256 KB Guessed the password with 782 queries.

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Guessed the password with 166 queries.
2 Correct 4 ms 384 KB Guessed the password with 306 queries.
3 Correct 4 ms 256 KB Guessed the password with 284 queries.
4 Correct 5 ms 256 KB Guessed the password with 668 queries.

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 376 KB Guessed the password with 20171 queries.
2 Correct 294 ms 368 KB Guessed the password with 29527 queries.
3 Correct 383 ms 368 KB Guessed the password with 44816 queries.
4 Incorrect 480 ms 416 KB Could not guess the password with 50000 queries.

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Guessed the password with 330 queries.
2 Correct 8 ms 256 KB Guessed the password with 782 queries.
3 Correct 2 ms 256 KB Guessed the password with 166 queries.
4 Correct 4 ms 384 KB Guessed the password with 306 queries.
5 Correct 4 ms 256 KB Guessed the password with 284 queries.
6 Correct 5 ms 256 KB Guessed the password with 668 queries.
7 Correct 286 ms 376 KB Guessed the password with 20171 queries.
8 Correct 294 ms 368 KB Guessed the password with 29527 queries.
9 Correct 383 ms 368 KB Guessed the password with 44816 queries.
10 Incorrect 480 ms 416 KB Could not guess the password with 50000 queries.

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 256 KB Guessed the password with 330 queries.
2 Correct 8 ms 256 KB Guessed the password with 782 queries.
3 Correct 2 ms 256 KB Guessed the password with 166 queries.
4 Correct 4 ms 384 KB Guessed the password with 306 queries.
5 Correct 4 ms 256 KB Guessed the password with 284 queries.
6 Correct 5 ms 256 KB Guessed the password with 668 queries.
7 Correct 286 ms 376 KB Guessed the password with 20171 queries.
8 Correct 294 ms 368 KB Guessed the password with 29527 queries.
9 Correct 383 ms 368 KB Guessed the password with 44816 queries.
10 Incorrect 480 ms 416 KB Could not guess the password with 50000 queries.