Submission #199657

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
199657	2020-02-02 13:18:55	mohammedehab2002	Password (RMI18_password)	C++14	100 / 100	436 ms	780 KiB

password

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#include <bits/stdc++.h>
using namespace std;
int f[26];
int query(string s);
string guess(int n,int c)
{
  for (char a='a';a<'a'+c;a++)
  f[a-'a']=query(string(n,a));
  string ans="";
  for (char a='a';a<'a'+c;a++)
  {
    int p=ans.size();
    string tmp=ans;
    for (int i=0;i<f[a-'a'];i++)
    {
      while (p>=31 && query(ans.substr(0,p-31)+string(i+1,a))<=p-31+i)
      p-=32;
      int st=max(p-31,0),en=p;
      while (st!=en)
      {
        int mid=(st+en+1)/2;
        if (query(ans.substr(0,mid)+string(i+1,a))>mid+i)
        st=mid;
        else
        en=mid-1;
      }
      tmp.insert(tmp.begin()+st,a);
      p=st;
    }
    ans=tmp;
 
 
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• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 30 / 30
• Subtask 5: 20 / 20