Compilare: main.c: In function 'main': main.c:28:16: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration] valoare+=abs(i-j); ^~~ main.c:11:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%d", &N); ^~~~~~~~~~~~~~~~~~~~~~~ main.c:14:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%d" , &v[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~