题解 | #牛牛的金币#

#include <stdio.h>

int main() {
    int x,y,x1,y1;
    scanf("%d %d\n",&x,&y);
    scanf("%d %d",&x1,&y1);
    if(y1>y)
    printf("u");
    if(y1<y)
    printf("d");
    if(x1>x)
    printf("r");
    if(x1<x)
    printf("l");
    return 0;
}