Submission #61835

#	Time	Username	Problem	Language	Result	Execution time	Memory
61835		theknife2001	Crayfish scrivener (IOI12_scrivener)	C++17	26 / 100	296 ms	52716 KiB

scrivener

#include <bits/stdc++.h>

using namespace std;
const int N=1e6+5;
int a[N];
char b[N];
int c[N];
char s[N];
int cnt;
int k=0;


void Init() {}

void TypeLetter(char L) {
    a[k]=1;
    b[k]=L;
    k++;
}

void UndoCommands(int U) {
    a[k]=2;
    c[k]=U;
    k++;
}

char GetLetter(int P) {
    if(cnt==0)
    {
        int j=0;
        k--;
        while(k>=0)
        {
            if(a[k]==1)
            {
                s[j]=b[k];
                j++;
            }
            else if(a[k]==2)
            {
                k=k-c[k];
            }
            else
            {
                cout<<k<<endl;
                assert(0);
            }
            k--;
        }
        reverse(s,s+j);
    }
    cnt=1;
    return s[P];
}

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