题解 | 简单密码

#include<iostream>
#include<string>

using namespace std;

int main() {
	string a;
	while (cin >> a) {
		if (a == "START") {
			string b;
			cin.ignore();
			getline(cin, b);
			for (int i = 0;i < b.size();i++) {
				if (b[i] >= 'A' && b[i] <= 'Z') {
					for (int j = 0;j < 5;j++) {
						b[i] = b[i] - 1;
						if (b[i] == 'A' - 1) {
							b[i] = 'Z';
						}
					}
				}
				else continue;
			}
			cout << b << '\n';
			string c;
			cin >> c;
			if (c == "END") continue;
		}
		else if (a == "ENDOFINPUT") break;
		else break;
	}
}