题解 | 机器人走方格I

#include <vector>
class Robot {
public:
    int countWays(int x, int y) {
        // write code here
        if(x==1 || y==1 ) return 1;
        if(x==2 && y == 2) return 2;
        return countWays(x-1, y) + countWays(x, y-1);

    }
};