#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 P[202020]; int Q[202020]; int hoge(vector V) { int C[2]={0,1}; int i; int N=V.size(); FOR(i,N) { if(V[i]>V[C[i%2]]) C[i%2]=i; } if(C[0]>N; FOR(i,N) cin>>P[i+1]; /* FOR(i,N) P[i+1]=i+1; random_shuffle(P+1,P+N+1); */ if(N==2) { cout<<0<<" "<<1< V; FOR(i,N+3) { if(Q[i]==0) { if(V.size()) { g++; ma=max(ma,hoge(V)+1); V.clear(); } } else { V.push_back(Q[i]); } } cout<