Compilare: main.cpp: In function 'int main()': main.cpp:46:19: warning: unused variable 'x' [-Wunused-variable] long long x ; ^ main.cpp:47:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n) ; ^ main.cpp:49:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%lld", v + i) ; ^