Submission #975757

#	Time	Username	Problem	Language	Result	Execution time	Memory
975757		marinaluca	Crayfish scrivener (IOI12_scrivener)	C++17	Compilation error	0 ms	0 KiB

scrivener

char ans[1000010];
int v[1000010], rez[1000010], mat[20][1000010], k;
void Init(){}
void Typeletter (char L){
    ans[v[++ k] = k] = L;
    rez[k] = rez[mat[0][k] = v[k - 1]] + 1;
    for (int i = 1; i < 20; ++ i){
        mat[i][k] = mat[i - 1][mat[i - 1][k]];
    }
}
void UndoCommands(int U){v[++ k] = v[k - U - 1];}

char GetLetter(int P){
    int a = v[k];
    for (int i = 20; i --;){
        if (rez[mat[i][a]] > P)
          a = mat[i][a];
    }
    return ans[a];
}

Compilation message (stderr)

scrivener.cpp: In function 'void Typeletter(char)':
scrivener.cpp:5:11: warning: operation on 'k' may be undefined [-Wsequence-point]
    5 |     ans[v[++ k] = k] = L;
      |           ^~~~
scrivener.cpp:5:11: warning: operation on 'k' may be undefined [-Wsequence-point]
scrivener.cpp: In function 'void UndoCommands(int)':
scrivener.cpp:11:28: warning: operation on 'k' may be undefined [-Wsequence-point]
   11 | void UndoCommands(int U){v[++ k] = v[k - U - 1];}
      |                            ^~~~
/usr/bin/ld: /tmp/ccVogvL4.o: in function `main':
grader.cpp:(.text.startup+0xff): undefined reference to `TypeLetter(char)'
collect2: error: ld returned 1 exit status