#include <stdio.h>
#include <stdlib.h>

int main(void){
    char buf[34];
    int n,k,t;
    
    fgets(buf, sizeof(buf), stdin);
    sscanf(buf, "%d %d %d", &n, &k, &t);
    
    if (abs(n)/k <= t){
        printf("Yes");
    }
    else{
        printf("No");
    }
    
    return 0;
}