Submission #1093737

#	Time	Username	Problem	Language	Result	Execution time	Memory
1093737		DobromirAngelov	Password (RMI18_password)	C++14	50 / 100	65 ms	728 KiB

password

#include<bits/stdc++.h>

using namespace std;

int query(string str);

vector<string> seq;
priority_queue<pair<int,int> > pq;

int queryLetter(char c,int cnt)
{
    string str="";
    for(int i=0;i<cnt;i++) str+=c;
    return query(str);
}

int mergeQuery(int ind1,int len,string last)
{
    string str=seq[ind1].substr(0,len);
    reverse(last.begin(), last.end());
    str+=last;
    return query(str);
}

void mergeSeq(int ind1,int ind2)
{
    string ret="";
    int ptr=seq[ind2].size()-1;
    for(int i=seq[ind1].size()-1;i>=0;i--)
    {
        if(ptr>=0) ret+=seq[ind2][ptr];
        while(1)
        {
            int cnt=mergeQuery(ind1,i+1,ret);
            if(cnt!=(i+1+ret.size()))
            {
                ret.pop_back();
                break;
            }
            else ptr--;
            if(ptr<0) break;
            ret+=seq[ind2][ptr];
        }
        ret+=seq[ind1][i];
    }
    for(int i=ptr;i>=0;i--) ret+=seq[ind2][i];
    reverse(ret.begin(), ret.end());
    seq[ind1]=ret;
}

string guess(int n,int s)
{
    for(int i=0;i<s;i++)
    {
        int cnt=queryLetter((char)(i+'a'), n);
        if(cnt>0)
        {
            string cur="";
            for(int j=0;j<cnt;j++) cur+=(char)(i+'a');
            seq.push_back(cur);
        }
    }

    for(int i=0;i<seq.size();i++)
    {
        pq.push({-seq[i].size(), i});
    }

    while(pq.size()>1)
    {
        int ind1=pq.top().second;
        pq.pop();
        int ind2=pq.top().second;
        pq.pop();
        pq.push({-seq[ind1].size()-seq[ind2].size(),ind1});
        mergeSeq(ind1,ind2);
    }

    int ind=pq.top().second;
    return seq[ind];
}

Compilation message (stderr)

password.cpp: In function 'void mergeSeq(int, int)':
password.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |             if(cnt!=(i+1+ret.size()))
      |                ~~~^~~~~~~~~~~~~~~~~~
password.cpp: In function 'std::string guess(int, int)':
password.cpp:64:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for(int i=0;i<seq.size();i++)
      |                 ~^~~~~~~~~~~

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