代码

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

char ibuf[10000000], obuf[10000000];
char *ips = ibuf, *ops = obuf;

inline int read() {
	register bool f = 1; register int x = 0;
	while (*ips <= 32) if (*++ ips == '-') f = 0;
	while (*ips > 32) (x = (x << 3) + (x << 1)) += *ips ++ & 15;
	return f ? x : -x;
}

inline void write(register int x) {
	static char _stk[20]; register char * ps = _stk;
	if (x < 0) *ops ++ = '-', x = -x;
	if (!x) *ps ++ = '0';
	while (x) *ps ++ = '0' + x % 10, x /= 10;
	while (ps != _stk) *ops ++ = *-- ps;
}

int main() {
	fread(ibuf, 1, 10000000, stdin);
	int n = read();
	while (n --) write(read() + read()), *ops ++ = 10;
	fwrite(obuf, 1, ops - obuf, stdout);
	return 0;
}

评测结果