Submission #1220532

#	Time	Username	Problem	Language	Result	Execution time	Memory
1220532		settop	Crayfish scrivener (IOI12_scrivener)	C++20	Compilation error	0 ms	0 KiB

scrivener

#include<bits/stdc++.h>
 
#define int long long
#define eb emplace_back
#define S second
#define dbg(v) cerr << #v << " = " << v << "\n"
#define F first
#define fall(i,a,n) for(int i=a;i<=n;i++)
#define rfall(i,a,n) for(int i=a;i>=n;i--)
#define pb push_back
#define all(x) x.begin(),x.end()
#define lsb(x) (x & -x)
#define sz(x) (int)x.size()
const int MAXN=1e6+10;
const int MAXL=21;
const int inf=1e14;
const int MOD=998244353;
 
using namespace std;
typedef pair<int,int> pii;
typedef tuple<int,int,int> trio;

int cont=0,s=0,op[MAXN],last=0;
int sparse[MAXN][MAXL];
set<pair<int,char>> st[MAXN];

void Init(){
}

void TypeLetter(char L) {
    cont++;
	st[s].insert({cont,L});
    sparse[cont][0]=last;
    fall(i,1,MAXL-1) sparse[cont][i]=sparse[sparse[cont][i-1]][i-1];
    op[cont]=s;
	s++;
}

void UndoCommands(int U) {
    cont++;
    sparse[cont][0]=cont-U-1;
    fall(i,1,MAXL-1) sparse[cont][i]=sparse[sparse[cont][i-1]][i-1];
    s=op[sparse[cont][0]]+1;
    op[cont]=s;
    last=cont;
}

char GetLetter(int P) {
    int x=cont;
    int p=0;
	while(true){
        auto it=(--st[P].upper_bound({x,'z'}));
		auto [j,ans]=*it;
        if(sparse[x][p]==0 || op[sparse[x][p]]<=P) return ans;
        x=sparse[x][p];
        p++;
    }
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cczpZGJz.o: in function `main':
grader.cpp:(.text.startup+0x16d): undefined reference to `UndoCommands(int)'
/usr/bin/ld: grader.cpp:(.text.startup+0x199): undefined reference to `GetLetter(int)'
collect2: error: ld returned 1 exit status