Compilare: main.cpp: In function 'void Update(int, int)': main.cpp:17:9: warning: unused variable 'i' [-Wunused-variable] int i ; ^ main.cpp: In function 'int suma(int)': main.cpp:24:9: warning: unused variable 'i' [-Wunused-variable] int i ; ^ main.cpp: In function 'int main()': main.cpp:47:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("schi.in" , "r" , stdin) ; ^ main.cpp:48:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("schi.out" , "w" , stdout) ; ^ main.cpp:49:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ("%d" , &N) ; ^ main.cpp:52:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d" , &v[i]) ; ^