#include <stdio.h>

int main(){
    int A, V, B, W, T,t,a,c;
    scanf("%d %d", &A,&V);
    scanf("%d %d", &B,&W);
    scanf("%d", &T);
    for (t = 1; t <= T;t++){
    for (a = 0; a <= t;a++){
    for (c = 0; c <= t;c++){
        if((A+V*a-V*(t-a))==(B+W*c-W*(t-c))){
            printf("YES");
            break;
        }
    }}}
    if(t==T+1){
        printf("NO");
    }
        return 0;
}
