题解 | 牛牛的金币

#include <stdio.h>
#include <stdlib.h>
int main() {
    int x,y;
    int x1,y1;
    scanf("%d %d\n",&x,&y);
    scanf("%d %d",&x1,&y1);
    int i = x1-x;
    int j = y1-y;
     int d = abs(i) + abs(j);
    if(d ==1){
        if(j > 0 && i == 0){
            printf("u");
        }
        else if(j < 0 && i == 0){
            printf("d");
        }
        else if(j == 0 && i > 0){
            printf("r");
        }
        else {
            printf("l");
        }
    }
    return 0;
}