大佬救命!!!

QAQ自己试没问题,但提交全WA

代码:

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a[28]={1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4,1,0};
	int count,n;
	string b;
	getline(cin,b);
	n=b.length();
	char c[n+1];
	for(int i=0;i<=n;i++)c[i]=b[i];
	for(int i=0;i<=n;i++){
		if(c[i]==' ')count+=1;
		count+=a[c[i]-97];
	}
	cout<<count;
	return 0;
}