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#include <iostream> #include <vector> using namespace std; const int maxn = 105; int idx[maxn]; bool check(int a, int b) { if(idx[a] == idx[b]) { return true; } return false; } void unite_two_elements(int a, int b) { int tmp = idx[a]; for(int i = 0; i < maxn; i++) { if(idx[i] == tmp) { idx[i] = idx[b]; } } } int main() { for(int i = 0; i < maxn; i++) { idx[i] = i; } while(true){ string s; int a, b; cin >> s >> a >> b; if(s == "unite") { unite_two_elements(a, b); } if(s == "check") { if(check(a, b)) { cout << "YES" << endl; } else { cout << "NO" << endl; } } } return 0; }
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