結果

問題 No.1053 ゲーミング棒
ユーザー ningenMeningenMe
提出日時 2020-05-15 22:56:10
言語 C++17
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 99 ms / 2,000 ms
コード長 3,602 bytes
コンパイル時間 2,129 ms
コンパイル使用メモリ 216,836 KB
実行使用メモリ 18,924 KB
最終ジャッジ日時 2023-10-19 16:12:51
合計ジャッジ時間 4,679 ms
ジャッジサーバーID
（参考情報） 		judge14 / judge13
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 1 ms
4,348 KB
testcase_01 AC 2 ms
4,348 KB
testcase_02 AC 2 ms
4,348 KB
testcase_03 AC 1 ms
4,348 KB
testcase_04 AC 2 ms
4,348 KB
testcase_05 AC 2 ms
4,348 KB
testcase_06 AC 2 ms
4,348 KB
testcase_07 AC 2 ms
4,348 KB
testcase_08 AC 1 ms
4,348 KB
testcase_09 AC 2 ms
4,348 KB
testcase_10 AC 1 ms
4,348 KB
testcase_11 AC 2 ms
4,348 KB
testcase_12 AC 2 ms
4,348 KB
testcase_13 AC 2 ms
4,348 KB
testcase_14 AC 1 ms
4,348 KB
testcase_15 AC 2 ms
4,348 KB
testcase_16 AC 2 ms
4,348 KB
testcase_17 AC 1 ms
4,348 KB
testcase_18 AC 1 ms
4,348 KB
testcase_19 AC 2 ms
4,348 KB
testcase_20 AC 2 ms
4,348 KB
testcase_21 AC 2 ms
4,348 KB
testcase_22 AC 2 ms
4,348 KB
testcase_23 AC 65 ms
18,924 KB
testcase_24 AC 89 ms
18,924 KB
testcase_25 AC 99 ms
18,652 KB
testcase_26 AC 86 ms
18,924 KB
testcase_27 AC 2 ms
4,348 KB
testcase_28 AC 2 ms
4,348 KB
testcase_29 AC 2 ms
4,348 KB
testcase_30 AC 18 ms
4,860 KB
testcase_31 AC 18 ms
4,396 KB
testcase_32 AC 19 ms
4,396 KB
testcase_33 AC 19 ms
4,864 KB
testcase_34 AC 18 ms
4,864 KB
testcase_35 AC 25 ms
4,396 KB
testcase_36 AC 25 ms
4,396 KB
権限があれば一括ダウンロードができます

ソースコード

diff # 

#include <bits/stdc++.h>
using namespace std;
using ll = long long;

#define ALL(obj) (obj).begin(),(obj).end()
#define SPEED cin.tie(0);ios::sync_with_stdio(false);

template<class T> using PQ = priority_queue<T>;
template<class T> using PQR = priority_queue<T,vector<T>,greater<T>>;

constexpr long long MOD = (long long)1e9 + 7;
constexpr long long MOD2 = 998244353;
constexpr long long HIGHINF = (long long)1e18;
constexpr long long LOWINF = (long long)1e15;
constexpr long double PI = 3.1415926535897932384626433L;

template <class T> vector<T> multivector(size_t N,T init){return vector<T>(N,init);}
template <class... T> auto multivector(size_t N,T... t){return vector<decltype(multivector(t...))>(N,multivector(t...));}
template <class T> void corner(bool flg, T hoge) {if (flg) {cout << hoge << endl; exit(0);}}
template <class T, class U>ostream &operator<<(ostream &o, const map<T, U>&obj) {o << "{"; for (auto &x : obj) o << " {" << x.first << " : " << x.second << "}" << ","; o << " }"; return o;}
template <class T>ostream &operator<<(ostream &o, const set<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const multiset<T>&obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr) o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
template <class T>ostream &operator<<(ostream &o, const vector<T>&obj) {o << "{"; for (int i = 0; i < (int)obj.size(); ++i)o << (i > 0 ? ", " : "") << obj[i]; o << "}"; return o;}
template <class T, class U>ostream &operator<<(ostream &o, const pair<T, U>&obj) {o << "{" << obj.first << ", " << obj.second << "}"; return o;}
template <template <class tmp>  class T, class U> ostream &operator<<(ostream &o, const T<U> &obj) {o << "{"; for (auto itr = obj.begin(); itr != obj.end(); ++itr)o << (itr != obj.begin() ? ", " : "") << *itr; o << "}"; return o;}
void print(void) {cout << endl;}
template <class Head> void print(Head&& head) {cout << head;print();}
template <class Head, class... Tail> void print(Head&& head, Tail&&... tail) {cout << head << " ";print(forward<Tail>(tail)...);}
template <class T> void chmax(T& a, const T b){a=max(a,b);}
template <class T> void chmin(T& a, const T b){a=min(a,b);}
void YN(bool flg) {cout << (flg ? "YES" : "NO") << endl;}
void Yn(bool flg) {cout << (flg ? "Yes" : "No") << endl;}
void yn(bool flg) {cout << (flg ? "yes" : "no") << endl;}

/*
 * @title UnionFindTree
 */
class UnionFindTree {
public:
	vector<int> parent;
	vector<int> rank;

	UnionFindTree(int N) : parent(N), rank(N,0){
		iota(parent.begin(),parent.end(),0);
	} 
	int root(int n) {
		return (parent[n] == n ? n : parent[n] = root(parent[n]));
	}
	inline int same(int n, int m) {
		return root(n) == root(m);
	}
	inline void unite(int n, int m) {
		n = root(n);
		m = root(m);
		if (n == m) return;
		if (rank[n]<rank[m]) {
			parent[n] = m;
		}
		else{
			parent[m] = n;
			if(rank[n] == rank[m]) rank[n]++;
		}
	}
};

int main() {
    int N; cin >> N;
    vector<int> A(N);
    for(int i = 0; i < N; ++i) {
        cin >> A[i];
    }
    UnionFindTree uf(N);
    for(int i = 0; i+1 < N; ++i) {
        if(A[i]==A[i+1]) uf.unite(i,i+1);
    }
    map<int,set<int>> mpst;
    for(int i = 0; i < N; ++i) {
        mpst[A[i]].insert(uf.root(i));
    }
    int cnt = 0;
    for(auto& e:mpst) {
        if(e.second.size()>=2) cnt++;
    }
    corner(cnt>=2,-1);
    corner(cnt==0, 0);
    corner(A[0]!=A[N-1] || mpst[A[0]].size()!=2,-1);
    cout << 1 << endl;
    return 0;
}
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