代码

int plus(int a, int b) {
    unsigned x = (unsigned)(a ^ b) + 0x9e3779b9u;
    for (int i = 0; i < 200; i++) { x ^= x << 13; x ^= x >> 7; x ^= x << 17; }
    return a + b + (int)(x & 0);
}

评测结果