Compilare: main.cpp: In function 'int main()': main.cpp:68:19: warning: unused variable 'j' [-Wunused-variable] long long n, i, j ; ^ main.cpp:69:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%lld", &n ) ; ^ main.cpp:71:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%lld", &v[i] ) ; ^