#include <iostream> #include <string> #include <stack> using namespace std; int main() { string a; getline(cin, a); int pos = a.find(' ', 0); stack<string> stks; while (-1 != pos){ string b = a.substr(0, pos); stks.push(b); a.erase(0, pos+1); pos = a.find(' ', 0); } if (a.len...