#include <stdio.h>
#include <math.h>

int main(int argc, char *argv[]){
    int n;
    int b = 0;

    scanf("%d", &n);

    double x = sqrt( 1 + 8 * n );
    
    if (ceil(x) == floor(x)) 
    {
        int y = ceil(x);
        y = y - 1;
        
        if (y % 2 == 0)
        {
            int i = y / 2;
            printf("YES\n%d", &i);
            b = 1;
        }
    }
    
    if (b == 0)
    {
        printf("NO");
    }

    return 0;
}