제출 #201149

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
201149		Atill83	Password (RMI18_password)	C++14	100 / 100	299 ms	688 KiB

password

#include <bits/stdc++.h>
#define ff first
#define ss second
using namespace std;

int query(string str);

pair<int, char> freq[30];

string solve(int l, int r){
    if(l == r){
        string a;
        for(int i = 0; i < freq[l].ff; i++) a += freq[l].ss;
        return a;
    }
    int m = (l + r) / 2;
    string a = solve(l, m), b = solve(m + 1, r);
    string ans;
    int l1 = 0, l2 = 0;
    while(l1 != a.length() && l2 != b.length()){
        int len = ans.length() + b.length() - l2 + 1;
        if(query(ans + a[l1] + b.substr(l2)) == len){
            ans += a[l1++];
        }else{
            ans += b[l2++];
        }
    }
    if(l1 < a.length()){
        for(int i = l1; i < a.length(); i++)
            ans +=a[i];
    }else{
        for(int i = l2; i < b.length(); i++)
            ans += b[i];
    }

    return ans;
}


string guess(int n, int s){
    int sum = 0;
    for(int i = 0; i < s - 1; i ++){
        string que;
        for(int j = 0; j < n; j++)
            que += (char)('a' + i);
        freq[i].ff = query(que);
        sum += freq[i].ff;
        freq[i].ss = (char)('a' + i);
    }
    freq[s - 1].ff = n - sum;
    freq[s - 1].ss = (char)('a' + s - 1);
    sort(freq, freq + s);
    return solve(0, s - 1);
}

컴파일 시 표준 에러 (stderr) 메시지

password.cpp: In function 'std::__cxx11::string solve(int, int)':
password.cpp:20:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(l1 != a.length() && l2 != b.length()){
           ~~~^~~~~~~~~~~~~
password.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     while(l1 != a.length() && l2 != b.length()){
                               ~~~^~~~~~~~~~~~~
password.cpp:28:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(l1 < a.length()){
        ~~~^~~~~~~~~~~~
password.cpp:29:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = l1; i < a.length(); i++)
                         ~~^~~~~~~~~~~~
password.cpp:32:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int i = l2; i < b.length(); i++)
                         ~~^~~~~~~~~~~~

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