代码量少一点的暴力题解

还是很暴力

#include<bits/stdc++.h>
using namespace std;

int pins[5];

int n;

void pin(string nowpin,int leftpin){
	if(leftpin==0){
		cout<<nowpin<<endl;
		return;
	}
	else{
		if(pins[n-leftpin]==2){
			pin(nowpin+"a",leftpin-1);
			pin(nowpin+"b",leftpin-1);
			pin(nowpin+"c",leftpin-1);
		}
		else if(pins[n-leftpin]==3){
			pin(nowpin+"d",leftpin-1);
			pin(nowpin+"e",leftpin-1);
			pin(nowpin+"f",leftpin-1);
		}
		else if(pins[n-leftpin]==4){
			pin(nowpin+"g",leftpin-1);
			pin(nowpin+"h",leftpin-1);
			pin(nowpin+"i",leftpin-1);
		}
		else if(pins[n-leftpin]==5){
			pin(nowpin+"j",leftpin-1);
			pin(nowpin+"k",leftpin-1);
			pin(nowpin+"l",leftpin-1);
		}
		else if(pins[n-leftpin]==6){
			pin(nowpin+"m",leftpin-1);
			pin(nowpin+"n",leftpin-1);
			pin(nowpin+"o",leftpin-1);
		}
		else if(pins[n-leftpin]==7){
			pin(nowpin+"p",leftpin-1);
			pin(nowpin+"q",leftpin-1);
			pin(nowpin+"r",leftpin-1);
			pin(nowpin+"s",leftpin-1);
		}
		else if(pins[n-leftpin]==8){
			pin(nowpin+"t",leftpin-1);
			pin(nowpin+"u",leftpin-1);
			pin(nowpin+"v",leftpin-1);
		}
		else if(pins[n-leftpin]==9){
			pin(nowpin+"w",leftpin-1);
			pin(nowpin+"x",leftpin-1);
			pin(nowpin+"y",leftpin-1);
			pin(nowpin+"z",leftpin-1);
		}
	}
}
int main(){
	int sum=0;
	cin>>n;
	
	for(int i=0;i<n;i++){
		cin>>pins[i];
		
		if(i==0){
			if(pins[i]==7 || pins[i]==9)
				sum+=4;
			else
				sum+=3;
		}
		else{
			if(pins[i]==7 || pins[i]==9)
				sum*=4;
			else
				sum*=3;
		}	
	}
	cout<<sum<<endl;
	pin("",n);
	return 0;
}