Model BAC 2018 Info

///SII 4.

#include <iostream>
#include <cstring>
using namespace std;

int main()
{
    char s[20],x[20];
    cin.getline(s,20);
    if(strlen(s)%2==0){
        strcpy(x,s);
    }
    else{
        strcpy(x,s);
       /// cout<<x+strlen(x)/2<<endl;
       /// cout<<x+strlen(x)/2+1<<endl;
        strcpy(x+strlen(x)/2,x+strlen(x)/2+1);
    }
    cout<<x;
    return 0;
}

SII 5.

#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    int n,a[51][51]={};
    cin>>n;
    for(int i=1;i<=n;i++){
        for(int j=1;j<=n;j++){
            if(i+j==n || i+j==n+1 || i+j==n+2) a[i][j]=1; ///pseudodiagonale sec
///            if(i==j || i==j+1 || i==j-1) a[i][j]=1; ///pseudodiagonale princ
            else a[i][j]=2;
            cout<<a[i][j]<<" ";
           /// cout<<i<<j<<" ";
        }
        cout<<endl;
    }
    return 0;
}

SIII 3.
#include <iostream>
#include <cmath>
using namespace std;

void divizori(int n,int &x,int &y,int &z)
{
    x=0;    y=0;    z=0;
    int i,j,k;
    for(i=1;i<=n/2;i++){
        for(j=i+1;j<=n/2;j++){
            for(k=j+1;k<=n/2;k++){
                if(i+j+k==n && n%i==0 && n%j==0 && n%k==0){
                    x=i;    y=j;    z=k;
                    break;
                }
            }
        }
    }
}
int main()
{
    int x,y,z,n;
    cin>>n;
    divizori(n,x,y,z);
    cout<<x<<" "<<y<<" "<<z;
    return 0;
}

SIII 4.
#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("bac.txt");

int a[100]={};
int main()
{
    int nr,subnr;
    while(fin>>nr){
        ///preiau toate subnumerele lui nr
        while(nr>=10){
            subnr=nr%100;
            a[subnr]++;
            nr=nr/10;
        }
    }
    for(int x=10;x<=99;x++){
        if(a[x]==1){
            cout<<x<<" ";
        }
    }
    return 0;
}