#include <cstdio> #include <iostream> #define REP(i,n) for(int i=0;i<n;i++) int main(){ int n, a[4]; std::string r; bool no[10] = {false}; scanf("%d", &n); while(n--){ scanf("%d %d %d %d", &a[0], &a[1], &a[2], &a[3]); std::cin >> r; if(r == "NO") REP(i,4) no[a[i]] = true; else REP(i,10) if(i!=a[0] && i!=a[1] && i!=a[2] && i!=a[3]) no[i] = true; } REP(i,10){ if(no[i]==false){ printf("%d\n", i); break; } } }