Compilare: main.cpp: In function 'int main()': main.cpp:42:45: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ( "pluricex.in" , "r" , stdin ) ; ^ main.cpp:43:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen ( "pluricex.out" , "w" , stdout ) ; ^ main.cpp:47:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d%d%d" , & n , & k , & d ) ; ^ main.cpp:51:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d" , & a [ i ] [ 0 ] ) ; ^ main.cpp:54:46: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf ( "%d" , & a [ i ] [ j ] ) ; ^