Submission #61818

#	Time	Username	Problem	Language	Result	Execution time	Memory
61818		theknife2001	Crayfish scrivener (IOI12_scrivener)	C++17	0 / 100	290 ms	3048 KiB

scrivener

#include <bits/stdc++.h>
#define ii pair < char , char >
#define fi first
#define se second


using namespace std;
const int N=1e6+5;
ii a[N];
char s[N];
bool q=0;
int i=0;


void Init() {}

void TypeLetter(char L) {
    a[i].fi='T';
    a[i].se=L;
    i++;
}

void UndoCommands(int U) {
    a[i].fi='F';
    a[i].se='0'+U;
    i++;
}

int j=0;

char GetLetter(int P) {
    if(!q)
    {
        j=0;
        i--;
        while(i>=0)
        {
            if(a[i].fi=='T')
            {
                s[j]=a[i].se;
                j++;
            }
            else if(a[i].fi=='F')
            {
                i-=(a[i].se-'0');
            }
            else
            {
                if('A'<=a[i].fi&&a[i].fi<='Z')
                    assert(0);
            }
            i--;
        }
        reverse(s,s+j);
    }
    q=1;
    return s[P];
}

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