제출 #668509

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
668509		RambaXGorilla	질문 (CEOI14_question_grader)	C++17	0 / 100	7051 ms	6116 KiB

encoder

using namespace std;

int encode(int N, int X, int Y){
    int x, y;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            if(j > X && j > Y) break;
            else if(j == X) x = i;
            else if(j == Y) y = i;
        }
    }
    return __builtin_ctz(x ^ (x & y)) + 1;
}

int decode(int N, int Q, int H){
    int q;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            if(j > Q) break;
            else if(j == Q) q = i;
        }
    }
    return (bool) (q & 1 << H - 1);
}

decoder

using namespace std;

int encode(int N, int X, int Y){
    int x, y;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            if(j > X && j > Y) break;
            else if(j == X) x = i;
            else if(j == Y) y = i;
        }
    }
    return __builtin_ctz(x ^ (x & y)) + 1;
}

int decode(int N, int Q, int H){
    int q;
    for(int i = 0, j = 0;i < 1 << 12;i++){
        if(__builtin_popcount(i) == 6){
            j++;
            if(j > Q) break;
            else if(j == Q) q = i;
        }
    }
    return (bool) (q & 1 << H - 1);
}

컴파일 시 표준 에러 (stderr) 메시지

encoder.cpp: In function 'int decode(int, int, int)':
encoder.cpp:25:31: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   25 |     return (bool) (q & 1 << H - 1);
      |                             ~~^~~
encoder.cpp: In function 'int encode(int, int, int)':
encoder.cpp:13:28: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |     return __builtin_ctz(x ^ (x & y)) + 1;
      |                          ~~^~~~~~~~~
encoder.cpp:13:28: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
encoder.cpp: In function 'int decode(int, int, int)':
encoder.cpp:25:12: warning: 'q' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |     return (bool) (q & 1 << H - 1);
      |            ^~~~~~~~~~~~~~~~~~~~~~~

decoder.cpp: In function 'int decode(int, int, int)':
decoder.cpp:25:31: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   25 |     return (bool) (q & 1 << H - 1);
      |                             ~~^~~
decoder.cpp: In function 'int encode(int, int, int)':
decoder.cpp:13:28: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized]
   13 |     return __builtin_ctz(x ^ (x & y)) + 1;
      |                          ~~^~~~~~~~~
decoder.cpp:13:28: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized]
decoder.cpp: In function 'int decode(int, int, int)':
decoder.cpp:25:12: warning: 'q' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |     return (bool) (q & 1 << H - 1);
      |            ^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 100