杭電oj —— 2055（ASSIC碼 、Java語言char類型單獨輸入：char c = sn.next().charAt(0);）

package com.demo2; import java.util.Scanner; /* * we define f(A) = 1, f(a) = -1, f(B) = 2, f(b) = -2, ... f(Z) = 26, f(z) = -26; * Give you a letter x and a number y , you should output the result

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