CF 5 A. Chat Server's Outgoing Traffic
题目:Chat Servers Outgoing Traffic
思路:水,map模拟
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
#include <cstdio> #include <iostream> #include <algorithm> #include <cmath> #include <cstring> #include <queue> #include <map> using namespace std; map<string,int>m; int main() { m.clear(); char s[110]; string str; int ans=0; while(gets(s)) { str=""; int l=strlen(s); if(s[0]=='+') { for(int i=1;i<l;i++) str+=s[i]; m[str]++; } else if(s[0]=='-') { for(int i=1;i<l;i++) str+=s[i]; map<string,int>::iterator it=m.find(str); m.erase(it); } else { int cnt=0; for(int i=0;i<l;i++) if(s[i]==':') { cnt=i; break; } ans+=m.size()*(l-1-cnt); //cout<<l<<":"<<cnt<<endl; } } cout<<ans<<endl; return 0; }