Submission #199693

#	Time	Username	Problem	Language	Result	Execution time	Memory
199693		Osama_Alkhodairy	Password (RMI18_password)	C++17	100 / 100	384 ms	580 KiB

password

#include <bits/stdc++.h>
//~ #include "grader.cpp"
using namespace std;

int query(string s);
string guess(int n, int c){
    vector <int> f(c);
    for(char i = 'a' ; i < 'a' + c ; i++){
        f[i - 'a'] = query(string(n, i));
    }
    string ans;
    for(char i = 'a' ; i < 'a' + c ; i++){
        string cur = ans;
        int e = ans.size();
        for(int j = 0 ; j < f[i - 'a'] ; j++){
            while(e >= 15 && query(ans.substr(0, e - 15) + string(j + 1, i)) != e - 15 + j + 1){
                e -= 16;
            }
            int l = max(0, e - 15), r = e;
            while(l <= r){
                int mid = (l + r) / 2;
                if(query(ans.substr(0, mid) + string(j + 1, i)) == mid + j + 1) l = mid + 1;
                else r = mid - 1;
            }
            cur.insert(cur.begin() + r, i);
        }
        ans = cur;
    }
    return ans;
}

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