A 签到题,没什么好说的 int a,b; cin>>a>>b; cout<<(a+b<=9? "Yes":"No")<<endl; B 排序+二分 ll n,x; cin>>n>>x; vector<ll>aa(n); for(auto &i:aa) cin>>i; std::sort(aa.begin(),aa.end()); if(x<aa[0]){ cout<<"0 "<<x<<endl; return 0; } int ...