Submission #722692

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
722692	2023-04-12 16:38:03	rainboy	Winter Driving (CCO19_day1problem3)	C11	0 / 25	10 ms	340 KiB

Main

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#include <stdio.h>
#include <stdlib.h>
#define N 200000
long long max(long long a, long long b) { return a > b ? a : b; }
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 aa[N]; long long dp[N], dq[N];
void dfs(int p, int i) {
  int o;
  dp[i] = aa[i], dq[i] = 0;
  for (o = eo[i]; o--; ) {
    int j = ej[i][o];
    if (j != p) {
      dfs(i, j);
      dp[i] += dp[j], dq[i] += dq[j];
    }
 
 
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Compilation message (stderr)

Main.c: In function 'append':
Main.c:13:23: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
   13 |  if (o >= 2 && (o & o - 1) == 0)
      |                     ~~^~~
Main.c: In function 'main':
Main.c:39:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |  scanf("%d", &n);
      |  ^~~~~~~~~~~~~~~
Main.c:43:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   43 |   scanf("%d", &aa[i]);
      |   ^~~~~~~~~~~~~~~~~~~
Main.c:45:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d", &i), i--;
      |   ^~~~~~~~~~~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5