제출 #668515

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
668515		RambaXGorilla	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++17	100 / 100	4149 ms	24220 KiB

encoder

using namespace std;
int conv[930] = {};
void fillConv(){
    if(conv[1]) return;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            conv[j] = i;
        }
    }
}

int encode(int N, int X, int Y){
    fillConv();
    return __builtin_ctz(conv[X] ^ (conv[X] & conv[Y])) + 1;
}

int decode(int N, int Q, int H){
    fillConv();
    return (bool) (conv[Q] & 1 << H - 1);
}

decoder

using namespace std;
int conv[930] = {};
void fillConv(){
    if(conv[1]) return;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            conv[j] = i;
        }
    }
}

int encode(int N, int X, int Y){
    fillConv();
    return __builtin_ctz(conv[X] ^ (conv[X] & conv[Y])) + 1;
}

int decode(int N, int Q, int H){
    fillConv();
    return (bool) (conv[Q] & 1 << H - 1);
}

컴파일 시 표준 에러 (stderr) 메시지

encoder.cpp: In function 'int decode(int, int, int)':
encoder.cpp:20:37: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   20 |     return (bool) (conv[Q] & 1 << H - 1);
      |                                   ~~^~~

decoder.cpp: In function 'int decode(int, int, int)':
decoder.cpp:20:37: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   20 |     return (bool) (conv[Q] & 1 << H - 1);
      |                                   ~~^~~

• Subtask 1: 100 / 100