#include <algorithm> #include <cstdio> #include <cstdlib> #include <iostream> #include <map> #include <string> using namespace std; void Slove(void) { string s; map<int,int> before, next; while ( getline(cin,s) ) { if ( s.empty() ) break; int number=atoi( s.c_str() ); if ( !before.count(number) ) b</int,int></string></map></iostream></cstdlib></cstdio></algorithm>…