Submission #722768

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
722768	2023-04-12 20:18:39	rainboy	Card Scoring (CCO19_day2problem1)	C11	Compilation error	0 ms	0 KiB

Main

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#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define N 1000000
int *xx[N]; double *yy[N]; int cnt[N], cnt_[N], xx_[N], n; double k;
int crossover(int x1, double y1, int x2, double y2) {
  int lower = x2, upper = n + 1;
  while (upper - lower > 1) {
    int x = (lower + upper) / 2;
    if (y1 + pow(x - x1, k) >= y2 + pow(x - x2, k))
      upper = x;
    else
      lower = x;
  }
  return upper;
}
void add(int a, double y) {
  while (cnt[a] && crossover(xx[a][cnt[a] - 2], yy[a][cnt[a] - 2], xx[a][cnt[a] - 1], yy[a][cnt[a] - 1]) <= crossover(xx[a][cnt[a] - 1], yy[a][cnt[a] - 1], xx_[a], y))
    cnt[a]--;
  if (cnt[a] == cnt_[a]) {
    xx[a] = (int *) realloc(xx[a], cnt_[a] * 2 * sizeof *xx[a]);
    yy[a] = (double *) realloc(yy[a], cnt_[a] * 2 * sizeof *yy[a]);
  }
  xx[a][cnt[a]] = xx_[a], yy[a][cnt[a]] = y, cnt[a]++;
 
 
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Compilation message (stderr)

Main.c: In function 'main':
Main.c:38:2: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |  scanf("%lf%d", &k, &n), k /= 2;
      |  ^~~~~~~~~~~~~~~~~~~~~~
Main.c:45:3: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |   scanf("%d", &a), a--;
      |   ^~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccGl8ZGE.o: in function `crossover':
Main.c:(.text+0x63): undefined reference to `pow'
/usr/bin/ld: Main.c:(.text+0x82): undefined reference to `pow'
/usr/bin/ld: /tmp/ccGl8ZGE.o: in function `main':
Main.c:(.text.startup+0x16d): undefined reference to `pow'
/usr/bin/ld: Main.c:(.text.startup+0x1af): undefined reference to `pow'
/usr/bin/ld: Main.c:(.text.startup+0x210): undefined reference to `pow'
collect2: error: ld returned 1 exit status