Compilare: main.c: In function 'find': main.c:6:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.c: In function 'main': main.c:24:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:29:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &c, &x, &y); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~