代码

#include<bits/stdc++.h>

#define gc getchar
#define pc putchar

using namespace std;
int a, b;
int read(){
	int k=1, x=0;
	char c=gc();
	if(c<'0'||c>'9'){
		if(c=='-') k=-1;
		c=gc();
	}
	while(c>='0'&&c<='9') x=x*10+c-'0', c=gc();
	return x*k;
}

void Out(int x){
	if(x<0) x=-x, pc('-');
	if(x<10){
		pc(x+'0');
		return;
	}
	Out(x/10); pc(x%10+'0');
}
int main(){
	freopen("a+b.in", "r", stdin);
	a=read(), b=read();
	Out(a+b);
}

评测结果