varianta 4 Paralela 45 (INFO )

I.1.c
  2.d
  3.d
  4.c
  5.b
III.
1.#include <bits/stdc++.h>
using namespace std;
int main()
{char s[100],s1[200];
int i,j,loc=-1;
cin.getline(s,100);
for(i=1;i<strlen(s);i++)
    {s1[++loc]=s[i-1];
    if(s[i]==s[i-1])
   s1[++loc]='#';}
   s1[++loc]=s[strlen(s)-1];
strcpy(s,s1);
cout<<s;
    return 0;
}

2.numarare(int n,int m)
{int x,nrcm,nrc,a,p,nr=0;
nrcm=log10(m)+1;
nrc=log10(n)+1;
a=n;
while(nrc<nrcm)
    {p=pow(10,nrc);
    nr=nr+(p-a)*nrc;
    a=p;
    nrc++;}
p=pow(10,nrcm-1);
nr=nr+(m-p+1)*nrcm;
return nr;}

3.#include <bits/stdc++.h>
using namespace std;
ifstream fin("BAC.TXT");
int ap[200];
int main()
{int n,maxi=0,i;
while(fin>>n)
    if(n<0)
    {ap[100+abs(n)]++;
    maxi=max( ap[100+abs(n)],maxi);}
    else
    {ap[n]++;
    maxi=max(ap[n],maxi);}
    for(i=0;i<=200;i++)
        if(ap[i]==maxi)
        if(i>100)
        cout<<"-"<<i-100<<" ";
        else
        cout<<i<<" ";
    return 0;
}