結果

問題 No.697 池の数はいくつか
ユーザー ningenMeningenMe
提出日時 2020-04-28 20:17:58
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 2,513 ms / 6,000 ms
コード長 4,022 bytes
コンパイル時間 2,501 ms
コンパイル使用メモリ 212,812 KB
実行使用メモリ 136,576 KB
最終ジャッジ日時 2024-11-08 08:38:09
合計ジャッジ時間 19,156 ms
ジャッジサーバーID
（参考情報） 		judge5 / judge4
このコードへのチャレンジ
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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 2 ms
5,248 KB
testcase_01 AC 2 ms
5,248 KB
testcase_02 AC 2 ms
5,248 KB
testcase_03 AC 2 ms
5,248 KB
testcase_04 AC 2 ms
5,248 KB
testcase_05 AC 2 ms
5,248 KB
testcase_06 AC 2 ms
5,248 KB
testcase_07 AC 2 ms
5,248 KB
testcase_08 AC 2 ms
5,248 KB
testcase_09 AC 2 ms
5,248 KB
testcase_10 AC 2 ms
5,248 KB
testcase_11 AC 2 ms
5,248 KB
testcase_12 AC 2 ms
5,248 KB
testcase_13 AC 2 ms
5,248 KB
testcase_14 AC 2 ms
5,248 KB
testcase_15 AC 2 ms
5,248 KB
testcase_16 AC 2 ms
5,248 KB
testcase_17 AC 2 ms
5,248 KB
testcase_18 AC 2 ms
5,248 KB
testcase_19 AC 2 ms
5,248 KB
testcase_20 AC 2 ms
5,248 KB
testcase_21 AC 2 ms
5,248 KB
testcase_22 AC 2 ms
5,248 KB
testcase_23 AC 2 ms
5,248 KB
testcase_24 AC 267 ms
18,048 KB
testcase_25 AC 270 ms
18,048 KB
testcase_26 AC 267 ms
18,048 KB
testcase_27 AC 265 ms
18,048 KB
testcase_28 AC 266 ms
18,048 KB
testcase_29 AC 1,681 ms
108,928 KB
testcase_30 AC 2,498 ms
136,576 KB
testcase_31 AC 1,676 ms
108,800 KB
testcase_32 AC 2,513 ms
136,576 KB
testcase_33 AC 2,487 ms
136,576 KB
testcase_34 AC 2,513 ms
136,576 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;}



//Union Find Tree
class UnionFindTree {
public:
	vector<int> parent;
    vector<int> rank;

    UnionFindTree(int N) : parent(N), rank(N,0){
		for (int i = 0; i < N; ++i) parent[i] = i;
	}
 
	int root(int n) {
		return (parent[n] == n ? n : parent[n] = root(parent[n]));
	}

    int same(int n, int m) {
		return root(n) == root(m);
	}
 
	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]++;
        }
	}
};

//verify https://atcoder.jp/contests/abc097/tasks/arc097_b

int main() {
    int H,W; cin >> H >> W;
    vector<vector<int>> A(H,vector<int>(W));
    for(int i = 0; i < H; ++i) {
        for(int j = 0; j < W; ++j) {
            cin >> A[i][j];
        }
    }
    UnionFindTree uf(H*W);
    vector<int> dy = {-1,1,0,0};
    vector<int> dx = {0,0,-1,1};
    for(int i = 0; i < H; ++i) {
        for(int j = 0; j < W; ++j) {
            for(int k = 0; k < 4; ++k){
                int y = i + dy[k];
                int x = j + dx[k];
                if(0 <= y && y < H && 0 <= x && x < W && A[i][j]==A[y][x]) {
                    uf.unite(i*W+j,y*W+x);
                }
            }
        }
    }
    set<int> st;
    for(int i = 0; i < H; ++i) {
        for(int j = 0; j < W; ++j) {
            if(A[i][j]){
                st.insert(uf.root(i*W+j));
            }
        }
    }
    cout << st.size() << endl;


    return 0;
}
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