P8738 [蓝桥杯 2020 国 C] 天干地支 90分

#include<iostream>
#include<cstring>
using namespace std;
int main() 
{
	string a[10]={"gui","jia","yi","bing","ding","wu","ji","geng","xin","ren"};
	string b[12]={"hai","zi","chou","yin","mao","chen","si","wu","wei","shen","you","xu"};
	long long n,ai,bi;
	cin>>n;
	n-=3;
	ai=n%10;
	bi=n%12;
	cout<<a[ai]<<b[bi];
	return 0;
}