Submission #709094

#	Time	Username	Problem	Language	Result	Execution time	Memory
709094		jamezzz	Password (RMI18_password)	C++17	30 / 100	267 ms	368 KiB

password

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

mt19937 rng(time(0));

int query(string str);

string guess(int n,int s){
	string ans="";
	int pv=0;
	vector<int> v;
	for(int i=0;i<s;++i)v.push_back(i);
	shuffle(v.begin(),v.end(),rng);
	for(int i:v){
		char c='a'+i;
		for(int j=0;j<ans.length();++j){
			string tmp=ans;
			tmp.insert(j,1,c);
			int res=query(tmp);
			if(res>pv){
				pv=res;
				swap(tmp,ans);
				tmp.clear();
				if(pv==n)return ans;
				continue;
			}
			else{
				tmp.clear();
				if(res==j)break;
			}
		}
		string tmp=ans;
		tmp.insert(tmp.length(),n-tmp.length(),c);
		pv=query(tmp);
		tmp.resize(pv);
		swap(ans,tmp);
		tmp.clear();
		if(pv==n)return ans;
	}
	return ans;
}

Compilation message (stderr)

password.cpp: In function 'std::string guess(int, int)':
password.cpp:16:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |   for(int j=0;j<ans.length();++j){
      |               ~^~~~~~~~~~~~~

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