Submission #332525

#	Time	Username	Problem	Language	Result	Execution time	Memory
332525		xt0r3	Password (RMI18_password)	C++14	40 / 100	103 ms	492 KiB

password

#include<bits/stdc++.h>
using namespace std;

int query(string str);

string merge(vector<string>& sol, int lo, int hi){
	if(lo == hi) return sol[lo];
	int mi = (lo + hi) / 2;
	string s1 = merge(sol, lo, mi);
	string s2 = merge(sol, mi + 1, hi);
	int curr = 0, dex = 0;
	string res = "";
	while(curr < (int)s1.size() && dex < (int)s2.size()){
		string tmp = res + s2[dex] + s1.substr(curr);
		int kene = res.size() + s1.size() - curr + 1;
		if(query(tmp) == kene){
			res += s2[dex++];
		}
		else{
            res += s1[curr++];
		}
	}
	if(curr < (int)s1.size()) res += s1.substr(curr);
	if(dex < (int)s2.size()) res += s2.substr(dex);
	return res;
}

string guess(int n, int s){
	vector<string> sol(s, "");
	for(int i = 0; i < s; i++){
		do{
			string ss = "a";
			ss[0] += i;
			sol[i] += ss;
		}while(query(sol[i]) == (int)sol[i].size());
		sol[i] = ((int)sol[i].size() == 1 ? "" : sol[i].substr(0, (int)sol[i].size() - 1));
	}
	return merge(sol, 0, s - 1);
}

• Subtask 1: 0 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 0 / 30
• Subtask 5: 0 / 20