#include #include #include using namespace std;int main() { int N; int* arr; int* NGF; cin >> N; arr = new int[N+1]; int cntarr[1000001] = {0,}; NGF = new int[N+1]; for(int i = 1 ; i > input; arr[i] = input; cntarr[input] += 1; } stack s; for(int i = 1; i