Submission #625620

#	Time	Username	Problem	Language	Result	Execution time	Memory
625620		kkkkkkkk	Three Friends (BOI14_friends)	C++14	0 / 100	82 ms	6272 KiB

friends

#include <iostream>

using namespace std;

int main()
{
    int n;
    string s;
    cin >> n >> s;
    if (n%2==0)
    {
        cout << "NOT POSSIBLE" << endl;
        return 0;
    }
    int cnt=0,poz=-1;
    bool ok=true,moze=true;
    for (int i=0,j=n/2+1;j<n,i<=n/2;)
    {
        if (s[i]==s[j])
            i++,j++;
        else if (s[i]!=s[j]&&ok==true)
            poz=i,i++,ok=false;
        else
        {
            moze=false;
            break;
        }    
    }
    if (moze)
        cnt++;
    ok=true,moze=true;
    for (int i=0,j=n/2;j<n,i<n/2;)
    {
        if (s[i]==s[j])
            i++,j++;
        else if (s[i]!=s[j]&&ok==true)
        {
            if (poz==-1)
                poz=j;
            j++,ok=false;
        }
        else
        {
            moze=false;
            break;
        }
    }
    if (moze)
        cnt++;
    if (cnt==0)
        cout << "NOT POSSIBLE" << endl;
    if (cnt==1)
    {
        //cout << poz << endl;
        if (poz>=n/2)
        {
            for (int i=0;i<n/2;i++)
                cout << s[i];
        }
        else
        {
            for (int i=n/2+1;i<n;i++)
                cout << s[i];
        }    
    }
    else
        cout << "NOT UNIQUE" << endl;

    return 0;
}

Compilation message (stderr)

friends.cpp: In function 'int main()':
friends.cpp:18:27: warning: left operand of comma operator has no effect [-Wunused-value]
   18 |     for (int i=0,j=n/2+1;j<n,i<=n/2;)
      |                          ~^~
friends.cpp:33:25: warning: left operand of comma operator has no effect [-Wunused-value]
   33 |     for (int i=0,j=n/2;j<n,i<n/2;)
      |                        ~^~

• Subtask 1: 0 / 35
• Subtask 2: 0 / 65