montanha.cpp

#include <bits/stdc++.h>

using namespace std;

int v[1024];

int main(){
  int n;
  cin >> n;
  for(int i = 1; i <= n; ++i){
   cin >> v[i]; 
  }
  for(int i = 2; i <= n - 1; ++i){
    if(v[i] < v[i - 1] && v[i] < v[i + 1]){
      printf("S\n");
      return 0;
    }
  }
  printf("N\n");
              
  return 0;
}