#include #include using namespace atcoder; //#pragma GCC optimize("Ofast") using namespace std; #define reps(i,s,n) for(int i = s; i < n; i++) #define rep(i,n) reps(i,0,n) #define Rreps(i,n,e) for(int i = n - 1; i >= e; --i) #define Rrep(i,n) Rreps(i,n,0) #define ALL(a) a.begin(), a.end() using ll = long long; using vec = vector; using mat = vector; ll N,M,H,W,Q,K,A,B; string S; using P = pair; using tp = tuple; const ll INF = (1LL<<61); template bool chmin(T &a, const T b){ if(a > b) {a = b; return true;} else return false; } template bool chmax(T &a, const T b){ if(a < b) {a = b; return true;} else return false; } template void my_printv(std::vector v,bool endline = true){ if(!v.empty()){ for(std::size_t i{}; i>N>>Q; vec a(Q), b(Q); rep(i, Q) { cin>>a[i]; --a[i]; } rep(i, Q) { cin>>b[i]; --b[i]; if(a[i] > b[i]) swap(a[i], b[i]); } vec left(Q, -1), right(Q, N); Rrep(i, Q){ if(i != Q - 1) { chmax(left[i], left[i + 1] - 1); chmin(right[i], right[i + 1] + 1); } if(a[i] == left[i] + 1 || b[i] == left[i] + 1){ left[i] += 1 + (a[i] == left[i] + 1 && b[i] == left[i] + 2); } if(a[i] == right[i] - 1 || b[i] == right[i] - 1){ right[i] -= 1 + (a[i] == right[i] - 2 && b[i] == right[i] - 1); } if(left[i] >= right[i]){ cout<<"NO"<= N || nxtpos <= left[i] || nxtpos >= right[i] || nxtpos == a[i] || nxtpos == b[i]) continue; pos = nxtpos; break; } cout<