zoj 1050 Start Up the Startup

zoj 1050 Start Up the Startup

#include <iostream>#include <map>#include <cmath>#include <stdio.h>using namespace std;string ten(10, '-');int main(int argc, char *argv[]){ int n; cin >> n; map<string, int> match; map<string, int> document; while ( n-- > 0 ) {  match.clear();  string a, b;  do  {   cin >> a;   if( a == ten)    break;   b = "";   for(unsigned int i = 0; i < a.size(); i++)   {    if(isdigit(a[i]) || islower(a[i]))     b += a[i];    else if( isupper(a[i]))     b += (tolower(a[i]));   }   if(b != "")    match[b]++;  }while(1);  document.clear();  cin >> a;  while(1)  {   do   {    if(a == ten)     break;    b = "";    for(int i = 0; i < a.size(); i++)    {     if(isdigit(a[i]) || islower(a[i]))      b += a[i];     else if( isupper(a[i]))      b += (tolower(a[i]));    }    if(match[b] > 0)     document[b]++;    cin >> a;   }while(1);   double sum = 0;   for(map<string, int>::iterator pos = match.begin(); pos != match.end(); pos++)   {    double m1 = pos->second;    double m2 = document[pos->first];    sum += sqrt(m1 * m2);   }   printf("%.2lfn", sum);   document.clear();   cin >> a;   if( a == ten)    break;  }  if(n > 0)   printf("n"); } return 0;}