Submission #251384

#	Time	Username	Problem	Language	Result	Execution time	Memory
251384		cheeheng	Password (RMI18_password)	C++14	80 / 100	634 ms	628 KiB

password

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

int query(string q);

int p[28] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27};

string guess(int n, int s){
    int cnt[28];
    for(char i = 'a'; i < 'a'+s; i ++){
        string temp = "";
        for(int j = 0; j < n; j ++){
            temp += i;
        }
        cnt[i-'a'] = query(temp);
    }

    random_shuffle(p, p+s);

    string temp = "";
    int cntMatch = 0;
    for(int i = 0; i < s; i ++){
        int indx = 0;
        int j = 0;
        while(j < cnt[p[i]]){
            string temp2 = temp;
            if(indx == 0){
                temp2 = (char)('a'+p[i]) + temp;
            }else{
                temp2 = temp2.substr(0, indx) + (char)('a'+p[i]) + temp2.substr(indx);
            }
            //printf("%d: %s %s\n", j, temp.c_str(), temp2.c_str());
            int res = query(temp2);
            if(res > cntMatch){
                temp = temp2;
                cntMatch = res;
                j ++;
            }
            indx ++;
        }
    }

    return temp;
}

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