Compilare: main.c: In function 'find': main.c:13:24: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat=] fprintf(fout,"%d",nr); ^ main.c:25:20: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat=] fprintf(fout,"%d\n", nr); ^ main.c:28:25: warning: format '%d' expects argument of type 'int', but argument 3 has type 'long int' [-Wformat=] fprintf(fout, "%d ",positions[i]); ^ main.c: In function 'main': main.c:38:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(s1, 2000000, fin); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:40:5: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] fgets(s2, 2000000, fin); ^~~~~~~~~~~~~~~~~~~~~~~