#include <iostream>#include <string.h>using namespace std;char plain[] = "pekinguniversity";int k1 = 3;int k2 = 5;int main(){ for (int i=0;i<strlen(plain);i++) { plain[i] = plain[i] - "a"+1; } for (int i=0;i<strlen(plain);i++) { plain[i] = plain[i] * k1 + k2; while (plain[i] > 26) plain[i] = plain[i] - 26; plain[i] = plain[i] - 1 + "a"; } for (int i=0;i<strlen(plain);i++) { cout << plain[i]; } cout << endl; return 0;}