Compilare: main.c: In function 'unite': main.c:10:7: warning: implicit declaration of function 'find' [-Wimplicit-function-declaration] sef[find(x)]=find(y); ^~~~ main.c:9:7: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.c: In function 'main': main.c:32:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~ main.c:37:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d%d",&cod,&x,&y); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~