Submission #682005

#	Time	Username	Problem	Language	Result	Execution time	Memory
682005		vjudge1	Mobile (BOI12_mobile)	C11	Compilation error	0 ms	0 KiB

mobile

#include <stdio.h>
#include <math.h>

double distance(int x1, int y1, int x2, int y2) {
    return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}

int main() {
    int n, l;
    scanf("%d %d", &n, &l);
    int x[n], y[n];
    for (int i = 0; i < n; i++) {
        scanf("%d %d", &x[i], &y[i]);
    }

    double max_distance = 0;
    int left = 0, right = 1;
    for (int i = 0; i <= l; i++) {
        while (right < n && distance(x[right], y[right], i, 0) < distance(x[left], y[left], i, 0)) {
            left++;
            right++;
        }
        max_distance = fmax(max_distance, distance(x[left], y[left], i, 0));
    }
    printf("%.3lf\n", max_distance);
    return 0;
}

Compilation message (stderr)

mobile.c: In function 'main':
mobile.c:10:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %d", &n, &l);
      |     ^~~~~~~~~~~~~~~~~~~~~~
mobile.c:13:9: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |         scanf("%d %d", &x[i], &y[i]);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccYdgih6.o: in function `distance':
mobile.c:(.text+0x28): undefined reference to `sqrt'
/usr/bin/ld: /tmp/ccYdgih6.o: in function `main':
mobile.c:(.text.startup+0x1f1): undefined reference to `fmax'
/usr/bin/ld: mobile.c:(.text.startup+0x26a): undefined reference to `sqrt'
/usr/bin/ld: mobile.c:(.text.startup+0x2a5): undefined reference to `sqrt'
/usr/bin/ld: mobile.c:(.text.startup+0x2d4): undefined reference to `sqrt'
collect2: error: ld returned 1 exit status