제출 #491087

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
491087	2021-11-30 13:27:49	rainboy	Tenis (COI19_tenis)	C11	39 / 100	78 ms	9232 KiB

tenis

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#include <stdio.h>
#include <string.h>
#define N 100000
#define N_  (1 << 17) /* N_ = pow2(ceil(log2(N))) */
long long sum[N_ * 2], pref[N_ * 2]; int ii[N_], n_;
void pul(int i) {
  int l = i << 1, r = l | 1;
  sum[i] = sum[l] + sum[r];
  if (pref[l] <= sum[l] + pref[r])
    pref[i] = pref[l], ii[i] = ii[l];
  else
    pref[i] = sum[l] + pref[r], ii[i] = ii[r];
}
void build(int *aa, int *yy, int *zz, int n) {
  int i;
  n_ = 1;
  while (n_ < n)
    n_ <<= 1;
  for (i = 0; i < n_; i++)
    pref[n_ + i] = sum[n_ + i] = i < n ? yy[aa[i]] + zz[aa[i]] - i * 2 : 0, ii[n_ + i] = i;
  for (i = n_ - 1; i > 0; i--)
    pul(i);
}
 
 
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컴파일 시 표준 에러 (stderr) 메시지

tenis.c: In function 'main':
tenis.c:42:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |  scanf("%d%d", &n, &q);
      |  ^~~~~~~~~~~~~~~~~~~~~
tenis.c:44:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   44 |   scanf("%d", &aa[i]), aa[i]--;
      |   ^~~~~~~~~~~~~~~~~~~
tenis.c:48:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   48 |   scanf("%d", &a), a--;
      |   ^~~~~~~~~~~~~~~
tenis.c:52:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |   scanf("%d", &a), a--;
      |   ^~~~~~~~~~~~~~~
tenis.c:59:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |   scanf("%d", &t);
      |   ^~~~~~~~~~~~~~~
tenis.c:61:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |    scanf("%d", &a), a--;
      |    ^~~~~~~~~~~~~~~
tenis.c:66:4: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |    scanf("%d%d%d", &t, &a, &b), a--, b--;
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~

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• Subtask 5: 0 / 49