Compilare: main.cpp: In function 'int main()': main.cpp:36:15: warning: unused variable 'a' [-Wunused-variable] long long a, b, sum = 0; ^ main.cpp:36:18: warning: unused variable 'b' [-Wunused-variable] long long a, b, sum = 0; ^ main.cpp:37:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:39:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x[i], &y[i]); ^