第一个样本点输出结果与答案一致却还是WA怎么办？

#include<iostream>
#include<string>
#include<cmath>
using namespace std;
int main()
{
	int ws(int a);
	int n;
	cin>>n;
	string line[n+1];
	int state,k=0;//k means the state is kept
	int x=0;
	int y=0;
	int gap;
	for(int i=0;i<n+1;i++)
	{
		getline(cin,line[i]);
	}
	for(int i=0;i<n+1;i++)
	{
		switch(line[i][0])
		{
			case 'a':state=1;k=0;break;
			case 'b':state=2;k=0;break;
			case 'c':state=3;k=0;break;
			default: k=1;
		}
		for(int ii=0;;ii++)
		{
			if(line[i][line[i].size()-1-ii]!=' ') y+=(line[i][line[i].size()-1-ii]-48)*pow(10,ii);
			else break;
			gap=(line[i].size()-1-ii)-1;
		}
		for(int ii=0;;ii++)
		{
			if(line[i][gap-1-ii]!=' '&&gap-1-ii!=-1) x+=(line[i][gap-1-ii]-48)*pow(10,ii);
			else break;
		}
		switch(state)
		{
			case 1:
				cout<<x<<'+'<<y<<'='<<x+y<<endl;
				cout<<ws(x)+ws(y)+ws(x+y)+2<<endl;
				break;
			case 2:
				cout<<x<<'-'<<y<<'='<<x-y<<endl;
				cout<<ws(x)+ws(y)+ws(x-y)+2<<endl;
				break;
			case 3:
				cout<<x<<'*'<<y<<'='<<x*y<<endl;
				cout<<ws(x)+ws(y)+ws(x*y)+2<<endl;
				break;
		}
		x=0;
		y=0;
	}
	return 0;
}
int ws(int a)
{
	int b=1;
	if(a<0) b++;
	for(;;)
	{
		a/=10;
		if(a==0) break;
		else b++;
	}
	return b;
}