int encode (int n, int x, int y) { for (int i=0; i<10; i++) { if ((x&(1<<i))!=(y&(1<<i))) { if (x&(1<<i)) return 10+i+1; else return i+1; } } }

int decode (int n, int q, int h) { int k=0; if (h>10) k=1, h-=10; if (q&(1<<(h-1))) { if (k) return 1; else return 0; } else { if (k) return 0; return 1; } }

# 1번째 컴파일 단계

encoder.cpp: In function 'int encode(int, int, int)':
encoder.cpp:10:3: warning: control reaches end of non-void function [-Wreturn-type]
   10 |   }
      |   ^