Compilare: main.c: In function 'main': main.c:391:68: warning: unused variable 'ans' [-Wunused-variable] int N, M, v1, v2, cost, d[10000], q[10000], min, X, rep[1000], ans; ^~~ main.c:391:57: warning: unused variable 'rep' [-Wunused-variable] int N, M, v1, v2, cost, d[10000], q[10000], min, X, rep[1000], ans; ^~~ main.c:391:54: warning: unused variable 'X' [-Wunused-variable] int N, M, v1, v2, cost, d[10000], q[10000], min, X, rep[1000], ans; ^ main.c:391:49: warning: unused variable 'min' [-Wunused-variable] int N, M, v1, v2, cost, d[10000], q[10000], min, X, rep[1000], ans; ^~~ main.c:391:39: warning: unused variable 'q' [-Wunused-variable] int N, M, v1, v2, cost, d[10000], q[10000], min, X, rep[1000], ans; ^ main.c:385:11: warning: variable 'h' set but not used [-Wunused-but-set-variable] heap *h; ^ main.c: In function 'createHeap': main.c:59:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:395:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &N, &M); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:407:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &v1, &v2, &cost); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c: In function 'removeEdge': main.c:277:16: warning: 'prev' may be used uninitialized in this function [-Wmaybe-uninitialized] prev->next = cur->next; ~~~~~~~~~~~^~~~~~~~~~~