56C - Corporation Mail - CodeForces Solution

data structures expression parsing implementation *1700

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C++ Code: 

#include<iostream>
using namespace std;int main()
{string x,arr[100];int ind=0,ans=0;cin>>x;
for(unsigned int a=0;a<x.length();a++){
if(x[a]=='.'){
for(int i=0;i<ind;i++)
if(arr[i]==arr[ind])ans++;
arr[ind]="";ind--;}
else if(x[a]==':' || x[a]==',')ind++;
else arr[ind]+=x[a];}cout<<ans<<endl;}


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