标签：long printf ace blog clu pre ++ for logs
思路：
只能向两个方向
累计差值即可
//By SiriusRen #include <cstdio> #include <cstring> #include <algorithm> using namespace std; int n,xx,yy;long long ans; int main(){ scanf("%d",&n); for(int i=1;i<=n;i++)scanf("%d%d",&xx,&yy),ans-=xx,ans+=yy; for(int i=1;i<=n;i++)scanf("%d%d",&xx,&yy),ans+=xx,ans-=yy; printf("%lld\n",ans); }
标签：long printf ace blog clu pre ++ for logs
原文地址：http://www.cnblogs.com/SiriusRen/p/6532721.html
