Compilare: main.cpp:3:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] main(){ ^ main.cpp: In function 'int main()': main.cpp:4:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("subsir2.in","r",stdin); ^ main.cpp:5:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("subsir2.out","w",stdout); ^ main.cpp:6:16: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ main.cpp:8:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&a[i]); ^