cf1207E——交互,思维
/* a=Ai^x b=Bj^x a^b=Ai^Bj 只要让A[]占后7位,B[]占前7位,就可以算出Bj 然后x=b^bj */ #include<bits/stdc++.h> using namespace std; #define N 205 int a,b,A[N],B[N]; void ask(int *a){ cout<<"? "; for(int i=1;i<=100;i++)cout<<a[i]<<" "; cout<<endl; } int main(){ for(int i=1;i<=100;i++) A[i]=i,B[i]=i*(1<<7); ask(A);scanf("%d",&a); ask(B);scanf("%d",&b); int ans=a^b,ansb=(ans>>7)<<7; //cout<<ans<<" "<<ansb<<'\n'; cout<<"! "<<(ansb^b)<<'\n'; }