제출 #480514

#제출 시각아이디문제언어결과실행 시간메모리
480514rainboyPopcount (COCI19_popcount)C++17
0 / 110
3 ms204 KiB
#include <stdio.h> #include <string.h> #define N 500 #define L 256 void mult2(int *aa) { int h; for (h = 0; h < L; h++) if ((aa[h] *= 2) >= 10) aa[h] -= 10, aa[h + 1]++; } void add1(int *aa) { int h; aa[0] += 1; for (h = 0; h < L; h++) if (aa[h] >= 10) aa[h] -= 10, aa[h + 1]++; } int main() { static int aa[L]; static char cc[N + 1]; int n, m, l, i; scanf("%d%*d", &n); for (m = 1; m < n; m <<= 1) { memset(aa, 0, L * sizeof *aa); for (i = n - 1; i >= 0; i--) { mult2(aa); if (i % (m * 2) < m) add1(aa); } l = L; while (l > 1 && aa[l - 1] == 0) l--; for (i = l - 1; i >= 0; i--) cc[l - 1 - i] = aa[i] + '0'; printf("A=(A&%s)+((A>>%d)&%s)\n", cc, m, cc); } return 0; }

컴파일 시 표준 에러 (stderr) 메시지

popcount.cpp: In function 'int main()':
popcount.cpp:29:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |  scanf("%d%*d", &n);
      |  ~~~~~^~~~~~~~~~~~~
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