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AtCoder C - Back and Forth 解法メモ

Posted at

2回目の行きの際にはL、Dは必ず一回発生し、U、Rは1回目よりも値が差分+1大きくなる。
同様に2回目帰りの際にはR,Uが必ず一回発生し、D、Rは1回目よりも値が差分+1大きくなる。

上記には気がつけたが、コーディングに落とし込む能力がなかった。


sx,sy,tx,ty = list(map(int, input().split()))
 
x = tx - sx # x座標間の差分を出す
y = ty - sy # y座標間の差分を出す
ans = "R"*x + "U"*y + "L"*x + "D"*y # 1回目の行きと帰り
ans += "D" + "R"*(x+1) + "U"*(y+1) + "L" + "U" + "L"*(x+1) + "D"*(y+1) + "R" # 2回目の行きと帰り
print(ans)



参考
https://atcoder.jp/contests/abc051/submissions/27297543

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