Submission #1079431

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079431		Trumling	Crayfish scrivener (IOI12_scrivener)	C++14	0 / 100	69 ms	28856 KiB

scrivener

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

typedef long long ll;
#define pb push_back
#define F first
#define S second
#define enter cout<<'\n';
#define INF 99999999999999999
#define MOD 1000000007
#define all(x) x.begin(),x.end()

string s;
bool tf=0;

vector<pair<ll,char>>v;
void Init() 
{

}

void TypeLetter(char L) {
  
  v.pb({v.size()-1,L});
}

void UndoCommands(int U) {
  v.pb({v.size()-U,'?'});
}

char GetLetter(int P) {
  if(!tf)
  {
    ll idx=v.size()-1;
    while(idx!=-1)
    {

    if(v[idx].S!='?')
      s+=v[idx].S;

    idx=v[idx].F;
    }
    for(int i=0;i<s.size()/2;i++)
      swap(s[i],s[s.size()-1-i]);
    tf=1;
  }

  return s[P];
}

Compilation message (stderr)

scrivener.cpp: In function 'char GetLetter(int)':
scrivener.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for(int i=0;i<s.size()/2;i++)
      |                 ~^~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40