Compilare: user.cpp: In function ‘int main()’: user.cpp:27:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int j = 0; j < v.size(); j ++ ) { ^ user.cpp:14:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "numere6.in" , "r", stdin ); ^ user.cpp:15:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "numere6.out", "w", stdout ); ^ user.cpp:17:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int n, m; scanf( "%d %d", &n, &m ); ^