제출 #547121

#제출 시각아이디문제언어결과실행 시간메모리
547121oToToT크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++17
5 / 100
439 ms262144 KiB
#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]; }

컴파일 시 표준 에러 (stderr) 메시지

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]; }
      |                              ^~~~~
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