'commit'

TangDou/LuoGuBook/TestA.cpp

@@ -0,0 +1,32 @@
+#include <bits/stdc++.h>
+using namespace std;
+const int N = 210;
+
+int p[N];
+char s[N], t[N];
+int main() {
+    int n;
+    cin >> n;
+    for (int i = 0; i < n; i++) {
+        int x;
+        cin >> x; // 输入的是 4 1 2 3 ,映射成: 3 0 1 2,改成下标从0开始，方便后续计算
+        p[i] = x - 1;
+    }
+    while (true) {
+        int m;
+        cin >> m;
+        if (m == 0) break;
+
+        cin >> s; // cin输入字符数组，与string没什么区别
+        // 补空格
+        for (int i = strlen(s); i < n; i++) s[i] = ' ';
+
+        for (int i = 1; i <= m; i++) {  // 加密m次
+            for (int j = 0; j < n; j++) // 每个字符
+                t[p[j]] = s[j];         // 替换
+            memcpy(s, t, sizeof t);     // 还原为s
+        }
+        cout << s << endl;
+    }
+    return 0;
+}