IO

模仿cin,cout的IO

#include <bits/stdc++.h>

struct IO {
	IO& operator >> (char& ch) { return ch = getchar(), *this; }
	template<typename T>
	IO& operator >> (T& a) {
	    a = 0;
		bool flag(0);
		char ch = getchar();
	    while(!isdigit(ch)) flag = ch == '-', ch = getchar();
	    while(isdigit(ch)) a = (a << 3) + (a << 1) + (ch ^ 48), ch = getchar();
	    if(flag) a = -a;
	    return *this;
	}
	
	IO& operator << (const char& ch) { return putchar(ch), *this; }
	short Stack[55];
	template<typename T>
	IO& operator << (T a) {
		if(a < 0) a = -a, putchar('-');
		int top(0);
		do Stack[++top] = a % 10; while(a /= 10);
		while(top) putchar(Stack[top--] | 48);
		return *this;
	}
} io;

int a, b;
int main() {
	io >> a >> b;
	io << a + b;
	return 0;
}