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]);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
/tmp/ccjETPdd.o: In function `ping(int, int)':
grader.c:(.text+0x30): multiple definition of `ping(int, int)'
/tmp/cc5lnXKR.o:network.cpp:(.text+0x0): first defined here
/tmp/ccjETPdd.o: In function `travelTo(int)':
grader.c:(.text+0xb0): multiple definition of `travelTo(int)'
/tmp/cc5lnXKR.o:network.cpp:(.text+0x10): first defined here
/tmp/ccjETPdd.o: In function `main':
grader.c:(.text.startup+0x0): multiple definition of `main'
/tmp/cc5lnXKR.o:network.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status