Submission #255176

#	Time	Username	Problem	Language	Result	Execution time	Memory
255176		anubhavdhar	Three Friends (BOI14_friends)	C++14	0 / 100	178 ms	6248 KiB

friends

#include<bits/stdc++.h>

#define ll long long int
#define pb push_back
#define mp make_pair
#define FOR(i,n) for(i=0;i<(n);++i)
#define FORe(i,n) for(i=1;i<=(n);++i)
#define FORr(i,a,b) for(i=(a);i<(b);++i)
#define FORrev(i,n) for(i=(n);i>=0;--i)
#define F0R(i,n) for(int i=0;i<(n);++i)
#define F0Re(i,n) for(int i=1;i<=(n);++i)
#define F0Rr(i,a,b) for(ll i=(a);i<(b);++i)
#define F0Rrev(i,n) for(int i=(n);i>=0;--i)
#define ii pair<ll,ll>
#define vi vector<ll>
#define vii vector<ii>
#define ff first 
#define ss second
#define cd complex<double>
#define vcd vector<cd>
#define ldd long double
#define dbgLine cerr<<"Line : "<<__LINE__<<'\n'
#define all(x) (x).begin(),(x).end()

using namespace std;

const short int __PRECISION = 10;

const ll MOD = 1e9+7;
const ll INF = 1e17 + 1101;
const ll LOGN = 17;
const ll MAXN = 2e5+5;
const ll ROOTN = 320;

const ldd PI = acos(-1);
const ldd EPS = 1e-7;

const int Alp = 26;

int main()
{
	/*
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	*/
	int N, ev = 0, od = 0;
	cin>>N;
	vector<int> freq(Alp);
	string S = "";
	// cout<<"asdasd\n";
	F0R(i, N)
	{
		char f;
		cin>>f;
		S.pb(f);
	}
	// cout<<"dsfsdf\n";
	F0R(i, N)
		++freq[S[i] - 'A'];
	F0R(i, Alp)
		if(freq[i]%2)
			++od;
		else
			++ev;
	if(od != 1 && N%2 == 0)
	{
		cout<<"NOT POSSIBLE\n";
		exit(0);
	}

	cout<<"NOT UNIQUE";

	return 0;
}

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