//No.2515 Similar Triangles
#include <stdio.h>
#include <stdlib.h>

int main(void){
    
    int x1, y1, x2, y2, x3;
    scanf("%d %d %d %d %d", &x1, &y1, &x2, &y2, &x3);

    int S1 = abs(x3 * y1 * 1/2);
    int S2 = abs(x3 * y2 * 1/2);

    if(S1 == S2){
        printf("Yes\n");
    }
    else{
        printf("No\n");
    }

    return 0;
}