grader.c: In function 'int main()':
grader.c:48:11: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
48 | scanf ("%d%d%d%d", &N, &a, &b, &M);
| ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
grader.c:51:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
51 | scanf("%d", &distance[u][v]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/cckYGSDN.o: in function `main':
grader.c:(.text.startup+0xc9): undefined reference to `findRoute(int, int, int)'
collect2: error: ld returned 1 exit status