Compilare: user.c: In function ‘main’: user.c:62:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d%d%d%d", &n, &m, &k, &l1, &c1, &l2, &c2); ^ user.c:69:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &l, &c); ^ user.c:104:17: warning: ‘total_from’ may be used uninitialized in this function [-Wmaybe-uninitialized] b = (total_to * total_from) % MOD; ^ user.c:104:17: warning: ‘total_to’ may be used uninitialized in this function [-Wmaybe-uninitialized]