# include <bits/stdc++.h>
using namespace std;int main() {int a, b;scanf("%d%d", &a, &b);printf("%d", a + b);return 0;}

C++两行题解

#include <bits/stdc++.h>
int main() { std::cout << accumulate(std::istream_iterator<int>(std::cin), std::istream_iterator<int>(), 0) << std::endl; }

用python简单多了 numbers = list(map(int, input().split())) print(sum(numbers))