Submission #873083

#	Time	Username	Problem	Language	Result	Execution time	Memory
873083		vjudge1	Password (RMI18_password)	C++17	100 / 100	176 ms	1928 KiB

password

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

int cnt[26];
set<char>st[26];

int query(string q);

string guess(int n, int s) {
	set<pair<int, string>>st;
	for(char c='a'; c<'a'+s; c++){
		string d;
		for(int i=1; i<=n; i++)
			d += c;
		cnt[c-'a'] = query(d);
		while(d.size() > cnt[c-'a']) 
			d.pop_back();
		if(cnt[c-'a']) st.insert({d.size(), d});
	} 
	while(st.size() > 1){
		string a = st.begin()->second;
		st.erase(st.begin());
		string b = st.begin()->second;
		st.erase(st.begin());
		string c; int l = 0, r = 0;
		while(c.size() < a.size()+b.size()){
			if(r < b.size()){
				c += b[r];
			}
			for(int j=l; j<a.size(); j++) 
				c += a[j];
			if(r < b.size() && query(c) == c.size()){
				r++;
				for(int j=l; j<a.size(); j++)
					c.pop_back();
			} else{
				for(int j=l; j<a.size(); j++)
					c.pop_back();
				if(r < b.size()) c.pop_back();
				c += a[l++];
			}
		} st.insert({c.size(), c});
	}
	return st.begin()->second;
}

Compilation message (stderr)

password.cpp: In function 'std::string guess(int, int)':
password.cpp:16:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   16 |   while(d.size() > cnt[c-'a'])
      |         ~~~~~~~~~^~~~~~~~~~~~
password.cpp:27:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |    if(r < b.size()){
      |       ~~^~~~~~~~~~
password.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |    for(int j=l; j<a.size(); j++)
      |                 ~^~~~~~~~~
password.cpp:32:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |    if(r < b.size() && query(c) == c.size()){
      |       ~~^~~~~~~~~~
password.cpp:32:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |    if(r < b.size() && query(c) == c.size()){
      |                       ~~~~~~~~~^~~~~~~~~~~
password.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(int j=l; j<a.size(); j++)
      |                  ~^~~~~~~~~
password.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for(int j=l; j<a.size(); j++)
      |                  ~^~~~~~~~~
password.cpp:39:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |     if(r < b.size()) c.pop_back();
      |        ~~^~~~~~~~~~

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