Submission #547121

#	Time	Username	Problem	Language	Result	Execution time	Memory
547121		oToToT	Crayfish scrivener (IOI12_scrivener)	C++17	5 / 100	439 ms	262144 KiB

scrivener

#include <ext/rope>

int cnt;
__gnu_cxx::crope a[1000001];

void Init() { cnt = 0; }
void TypeLetter(char c) { a[++cnt] = a[cnt] + c; }
void UndoCommands(int k) { a[++cnt] = a[cnt-k-1]; }
char GetLetter(int k){ return a[cnt][k]; }

Compilation message (stderr)

scrivener.cpp: In function 'void TypeLetter(char)':
scrivener.cpp:7:29: warning: operation on 'cnt' may be undefined [-Wsequence-point]
    7 | void TypeLetter(char c) { a[++cnt] = a[cnt] + c; }
      |                             ^~~~~
scrivener.cpp: In function 'void UndoCommands(int)':
scrivener.cpp:8:30: warning: operation on 'cnt' may be undefined [-Wsequence-point]
    8 | void UndoCommands(int k) { a[++cnt] = a[cnt-k-1]; }
      |                              ^~~~~

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