#include <iostream>
#include <string>

const int tmax = 100;
const int smax = 32;

struct ELEM
     {char NOME[smax];
      int V;
     };
     
int RICERCA(ELEM T[],int n,char S[])
    {for(int i=0; i<n; ++i)
          if (strcmp(T[i].NOME,S) == 0) return i;
     return -1;
    }

void LEGGI_STRINGA(char S[])
    {int i=0;
     char C;
     do C = cin.get(); while (C == ' ');
     while (i < smax-1 && C != ' ' && C != '\n')
        {S[i] = C;
         i++;
         C = cin.get();
        }
     S[i]='\0';
     return;
    }
     
int main()
    {ELEM TAB[tmax];
     char s[smax];
     int i=0;
     cout << "Dai sequenza di stringhe terminata da stop" << endl;
     do
       {LEGGI_STRINGA(s); 
        if (strcmp(s,"stop") == 0) break;
        if (RICERCA(TAB,i,s) == -1)
              {strcpy(TAB[i].NOME,s);
               TAB[i].V = strlen(s);
               i++;
              }
       }
     while (i < tmax);
     
     int n = i;
     int imax = 0;
     for (int i=1; i<n; ++i)
        if (TAB[i].V > TAB[imax].V)
            imax = i;
     cout << "La stringa piu' lunga e': " << TAB[imax].NOME;
     
     return 0;
   }