代码

#include <bits/stdc++.h>
// fast_io
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
#ifdef LOCAL
template<typename T=int>
T ii() {
    T x;
    std::cin >> x;
    return x;
}
template<typename T=int>
void oo(int x, char c = 10) {
    std::cout << x << c << std::flush;
}
#else
char bufI[1 << 19], *endI = bufI + sizeof(bufI), *ptrI = endI;
char bufO[1 << 19], *endO = bufO + sizeof(bufO), *ptrO = bufO;
void __attribute((constructor)) load() {
    memcpy(bufI, ptrI, endI - ptrI);
    fread(endI - ptrI + bufI, 1, ptrI - bufI, stdin);
    ptrI = bufI;
}
void __attribute((destructor)) flush() {
    fwrite(bufO, 1, ptrO - bufO, stdout);
    ptrO = bufO;
}
template<typename T=int>
T ii() {
    T x;
    int n{};
    for (; *ptrI < 48; ++ptrI) n = *ptrI == 45;
    for (; *ptrI > 47; ++ptrI) x = x * 10 + *ptrI - 48;
    return n ? -x : +x;
}
template<typename T=int>
void oo(int x, char c = 10) {
    if (endO - ptrO < 32) flush();
    if (x < 0) x = -x, *ptrO++ = '-';
    static char buf[21];
    char *end = buf + 21;
    char *ptr = buf + 21;
    *--ptr = c;
    for (; x >= 10; x /= 10)
        *--ptr = char(48 + x % 10);
    *--ptr = char(48 + x);
    memcpy(ptrO, ptr, end - ptr);
    ptrO += end - ptr;
}
#endif
int main() {
    for (auto i = ii(); i > 0; --i) oo(ii() + ii());
}

评测结果