std::cout<<"Goodbye 2019"<<" "<<"Hello 2020"<<'\n';

#include<iostream>
#include<cstring>
#include<string>
#include<cstdio>
#include<algorithm>

inline void read(int &T) {
    int x=0;bool f=0;char c=getchar();
    while(c<'0'||c>'9'){if(c=='-')f=!f;c=getchar();}
    while(c>='0'&&c<='9'){x=x*10+c-'0';c=getchar();}
    T=f?-x:x;
}

int main() {
    std::cout<<"Goodbye 2019"<<" "<<"Hello 2020"<<'\n';
    return 0;
}

转眼间2019年已经过去了，2020年已经到来了。

std::cout<<"Goodbye 2019"<<" "<<"Hello 2020"<<'\n';

原文：https://www.cnblogs.com/poi-bolg-poi/p/12178854.html