Submission #1190858

#	Time	Username	Problem	Language	Result	Execution time	Memory
1190858		Joon_Yorigami	Crayfish scrivener (IOI12_scrivener)	C++20	Compilation error	0 ms	0 KiB

scrivener

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

ll ancestor[1000002][25];
ll currletter[1000002];
ll length[1000002];
ll plen = 0, pt = 0;
void Init()
{

}

void TypeLetter(char L)
{
    plen+=1;
    pt=plen-1;
    currletter[plen] = L;
    length[plen] = length[pt]+1;
    ancestor[plen][0] = pt;
    for(int i=1;i<=24;i++)
    {
        ancestor[plen][i] = ancestor[ancestor[plen][i-1]][i-1];
    }
}

void UndoCommands(int U)
{
    plen+=1;
    pt=plen-U-1;
    currletter[plen]=currletter[pt];
    length[plen]=length[pt];
    for(int i=0;i<=24;i++)
    {
        ancestor[plen][i]=ancestor[pt][i];
    }
}

char GetLetter(int P)
{
    P+=1;
    ll k;
    k=length[plen]-P;
    pt=plen;
    for(int i=24;i>=0;i-=1)
    {
        if((1<<i)&k)
        {
            pt=ancestor[pt][i];
        }
    }
    return currletter[pt];
}

int main()
{
	int t,x;
    char op,c;
	cin >> t;
	while(t--)
    {
		cin >> op;
		if(op=='T')
        {
			cin >> c;
			TypeLetter( c );
		}
		if(op=='U')
        {
			cin >> x;
			UndoCommands( x );
		}
		if(op=='P')
        {
			cin >> x;
			cout << GetLetter( x ) << endl;
		}
	}
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc08Sy8C.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccT1Gx4a.o:scrivener.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status