#include <bits/stdc++.h> using namespace std; void scan(__int128 &x)//输入 { x = 0; int f = 1; char ch; if((ch = getchar()) == ‘-‘) f = -f; else x = x*10 + ch-‘0‘; while((ch = getchar()) >= ‘0‘ && ch <= ‘9‘) x = x*10 + ch-‘0‘; x *= f; } void print(__int128 x)//输出 { if(x < 0) { x = -x; putchar(‘-‘); } if(x > 9) print(x/10); putchar(x%10 + ‘0‘); } int main() { __int128 a, b; scan(a); scan(b); print(a + b); puts(""); print(a*b); return 0; }