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Submission #286933

# Submission time Handle Problem Language Result Execution time Memory
286933 2020-08-31T07:29:01 Z crossing0ver Password (RMI18_password) C++17
0 / 100
 113 ms 364 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();
		char LAST = ((int)pref.size() ? pref.back() : 'a');
		int cur = len;
		for (int z = 1; z + len <= n; z++) {
			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;
			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: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
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 256 KB Returned early from guess() after 283 queries.
2 Halted 0 ms 0 KB -

Subtask #2
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 256 KB Returned early from guess() after 148 queries.
2 Halted 0 ms 0 KB -

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 113 ms 364 KB Returned early from guess() after 12417 queries.
2 Halted 0 ms 0 KB -

Subtask #4
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 256 KB Returned early from guess() after 283 queries.
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 256 KB Returned early from guess() after 283 queries.
2 Halted 0 ms 0 KB -