#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int N; int X[202020],Y[202020]; int F[202020]; int R[202020]; int rev[2020202]; void solve() { int i,j,k,l,r,x,y; string s; MINUS(rev); cin>>N; int M=0; FOR(i,N) cin>>X[i]; FOR(i,N) { cin>>Y[i]; if(rev[Y[i]]!=-1) { cout<<-1< Q; MINUS(R); FOR(i,N) Q.push(i); for(i=M;i>=0;i--) { if(Q.empty()) { cout<<-1<=0) { if(R[x]!=-1) { cout<<-1<0) { Q.push(x); } F[R[x]]=i; X[R[x]]--; } else { if(R[x]!=-1) { if(X[R[x]]>0) { Q.push(x); } F[R[x]]=i; X[R[x]]--; } else { Q.push(x); } } } if(Q.size()) { cout<<-1<