Compilare: main.cpp: In function 'void input()': main.cpp:11:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d" , &n , &k ) ; ^ main.cpp: In function 'int main()': main.cpp:63:46: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ( "diferente.in" , "r" , stdin ) ; ^ main.cpp:64:48: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ( "diferente.out" , "w" , stdout ) ; ^