Submission #831972

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
831972	2023-08-20 18:54:45	rainboy	Solar Storm (NOI20_solarstorm)	C11	100 / 100	279 ms	141916 KiB

SolarStorm

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#include <stdio.h>
#include <stdlib.h>
 
#define N 1000000
 
int max(int a, int b) { return a > b ? a : b; }
 
int n, k;
long long xx[N], ss[N + 1]; int ll[N], rr[N];
int *ej[N], eo[N];
 
void append(int i, int j) {
  int o = eo[i]++;
 
  if (o >= 2 && (o & o - 1) == 0)
    ej[i] = (int *) realloc(ej[i], o * 2 * sizeof *ej[i]);
  ej[i][o] = j;
}
 
int qu[N], cnt; long long s_; int i_;
 
void dfs(int i) {
  int o;
  long long s;
 
  qu[cnt++] = i;
  s = ss[rr[i]] - ss[ll[qu[max(cnt - k, 0)]]];
  if (s_ < s)
    s_ = s, i_ = i;
  for (o = eo[i]; o--; ) {
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

SolarStorm.c: In function 'append':
SolarStorm.c:15:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   15 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
SolarStorm.c: In function 'main':
SolarStorm.c:43:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |  scanf("%d%d%lld", &n, &k, &d);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SolarStorm.c:45:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%lld", &xx[i]), xx[i] += xx[i - 1];
      |   ^~~~~~~~~~~~~~~~~~~~~
SolarStorm.c:47:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |   scanf("%lld", &ss[i]), ss[i] += ss[i - 1];
      |   ^~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 7 / 7
• Subtask 3: 11 / 11
• Subtask 4: 8 / 8
• Subtask 5: 18 / 18
• Subtask 6: 16 / 16
• Subtask 7: 30 / 30