/* -*- coding: utf-8 -*- * * 2655.cc: No.2655 Increasing Strides - yukicoder */ #include #include using namespace std; /* constant */ /* typedef */ typedef long long ll; /* global variables */ /* subroutines */ bool checkodd(int n) { // sig_i 2*i-1 = 2*(n*(n+1)/2)-n = n^2+n-n = n^2 // n=2: 1,3 NG // n=4: 1,3,5,7 OK // n=6: 1,3,5,7,9,11 OK // n=8: 1,3,5,7,9,11,13,15 OK // n=10: 1,3,5,7,9,11,13,15,17,19 OK return (n > 2 && ! (n & 1)); } bool checkeven(int n) { // sig_i 2*i = n(n+1) // n=3: 2,4,6 OK // n=4: 2,4,6,8 OK // n=5: 2,4,6,8,10 NG // n=6: 2,4,6,8,10,12 NG // n=7: 2,4,6,8,10,12,14 OK // n=8: 2,4,6,8,10,12,14,16 OK return (n > 2 && ((n & 3) == 3 || (n & 3) == 0)); } /* main */ int main() { int n; scanf("%d", &n); int x = (n + 1) / 2, y = n / 2; if (checkodd(x) && checkeven(y)) puts("Yes"); else puts("No"); return 0; }