Submission #975770

#	Time	Username	Problem	Language	Result	Execution time	Memory
975770		marinaluca	Crayfish scrivener (IOI12_scrivener)	C++14	Compilation error	0 ms	0 KiB

scrivener

char c[1000010];
int a[1000010], lev[1000010], st[20][1000010], t;
void Init(){}
void Typeletter (char L){
  int i;
    c[a[++t] = t] = L;
    lev[t] = lev[st[0][t] = a[t - 1]] + 1;
    for (i = 1; i < 20; ++ i)
        st[i][t] = st[i - 1][st[i - 1][t]];
}
void UndoCommands(int U){a[++t] = a[t - U - 1];}

char GetLetter(int P){
    int aa = a[t], i;
    for (i = 20; i --;)
        if (lev[st[i][aa]] > P)
          aa = st[i][aa];
    return c[aa];
}

Compilation message (stderr)

scrivener.cpp: In function 'void UndoCommands(int)':
scrivener.cpp:11:28: warning: operation on 't' may be undefined [-Wsequence-point]
   11 | void UndoCommands(int U){a[++t] = a[t - U - 1];}
      |                            ^~~
scrivener.cpp:11:28: warning: operation on 't' may be undefined [-Wsequence-point]
/usr/bin/ld: /tmp/cc2vDsfA.o: in function `main':
grader.cpp:(.text.startup+0xff): undefined reference to `TypeLetter(char)'
collect2: error: ld returned 1 exit status