代码

#include <math.h>
#include <stdio.h>
#include <string.h>

#define debug(...) fprintf(stderr, __VA_ARGS__)

#define PI 3.14159265358979323846

template <class T>
inline void swap(T& a, T& b) {
    T t = a;
    a = b, b = t;
}

namespace IO {
const int BUF_SIZE = 1 << 15;
char in_buf[BUF_SIZE], out_buf[BUF_SIZE];
char* p_in_buf = in_buf + BUF_SIZE;
char* p_out_buf = out_buf;

inline char get_char() {
    if (p_in_buf == in_buf + BUF_SIZE) {
        fread(in_buf, 1, BUF_SIZE, stdin), p_in_buf = in_buf;
    }
    return *(p_in_buf++);
}

inline void put_char(char x) {
    if (p_out_buf == out_buf + BUF_SIZE) {
        fwrite(out_buf, 1, BUF_SIZE, stdout), p_out_buf = out_buf;
    }
    *(p_out_buf++) = x;
}

inline void flush() {
    if (p_out_buf != out_buf) {
        fwrite(out_buf, 1, p_out_buf - out_buf, stdout);
        p_out_buf = out_buf;
    }
}
}  // namespace IO

#define getchar() IO::get_char()
#define putchar(x) IO::put_char(x)

inline int getint() {
    int x = 0;
    char c = getchar();
    while (c <= 32)
        c = getchar();
    int f = 1;
    if (c == '-')
        f = -1, c = getchar();
    while (c > 32)
        x = x * 10 + c - 48, c = getchar();
    return x * f;
}

template <class T>
inline void _putint(T x) {
    return x ? _putint(x / 10), putchar(48 + x % 10), void() : void();
}

template <class T>
inline void putint(T x) {
    if (x < 0)
        return putchar('-'), putint(-x), void();
    return x == 0 ? putchar('0'), void() : _putint(x), void();
}

inline void getline(char* s) {
    char c = getchar();
    while (c == '\n')
        c = getchar();
    while (c != '\n')
        *(s++) = c, c = getchar();
    *s = 0;
}

// ==== header ====

int main() {
    int n = getint();

    for (int i = 1; i <= n; i++) {
        int a, b;
        a = getint();
        b = getint();
        putint(a + b);
        putchar('\n');
    }

    IO::flush();
}

评测结果