#include<cstdio>
long long a[200005];

int main(){
    int n;
    scanf("%d",&n);
    for(int i = 1; i <= n; i++) scanf("%lld",&a[i]);
    long long sum = 0;
    int ok = 1;
    for(long long i = n; i >= 1; i--){
        long long cur = sum+a[i];
        if(cur%i==0){
            sum += cur/i;
        }
        else ok = 0;
    }
    if(ok) printf("Yes\n");
    else printf("No\n");
    return 0;
}