题解 | #牛牛的金币#

#include <stdio.h>

int main() {
    int x = 0;//牛牛的坐标
    int y = 0;
    int x1 = 0;//金币的坐标
    int y1 = 0;
    scanf("%d %d", &x, &y);//输入
    scanf("%d %d", &x1, &y1);
    if (y1 == y + 1)
    {
        printf("u\n");
    }
    if (y1 == y - 1)
    {
        printf("d\n");
    }
    if (x1 == x + 1)
    {
        printf("r\n");
    }
    if (x1 == x - 1)
    {
        printf("l\n");
    }
    return 0;
}