結果
問題 | No.348 カゴメカゴメ |
ユーザー | kei |
提出日時 | 2018-11-03 01:03:48 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 331 ms / 2,000 ms |
コード長 | 4,058 bytes |
コンパイル時間 | 2,224 ms |
コンパイル使用メモリ | 196,876 KB |
実行使用メモリ | 31,152 KB |
最終ジャッジ日時 | 2024-11-20 18:00:24 |
合計ジャッジ時間 | 7,693 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 53 |
ソースコード
#include "bits/stdc++.h" using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; const int INF = 1e9; const ll LINF = 1e18; inline ll gcd(ll a, ll b) { return b ? gcd(b, a%b) : a; } inline ll lcm(ll a, ll b) { return a / gcd(a, b)*b; } template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; } template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; } template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; } template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; } /* <url:https://yukicoder.me/problems/no/348> 問題文============================================================ ================================================================= 解説============================================================= ================================================================ */ int dx[8] = {1,1,0,-1,-1,-1, 0, 1}; int dy[8] = {0,1,1,1 ,0 ,-1,-1,-1}; map<ll,ll> mp; vector<int> Flag; vector<set<int>> G; pll rec(int n,int par = -1){ ll sum1 = 0,sum2 = 0; if(Flag[n] == 0){ for(auto next:G[n]){ if(next == par) continue; auto ret = rec(next,n); sum1 += max(ret.first,ret.second); sum2 += ret.second; } }else{ sum1 = mp[n]; for(auto next:G[n]){ if(next == par) continue; auto ret = rec(next,n); sum2 += max(ret.first,ret.second); sum1 += ret.second; } } return {sum1,sum2}; } ll solve(){ ll res = 0; int N,M; cin >> N >> M; vector<vector<char>> grid(N+2,vector<char>(M+2,'.')); for(int i = 1; i <= N; i++) for(int j = 1; j <= M;j++) cin >> grid[i][j]; vector<vector<int>> checked(N+2,vector<int>(M+2,-1)); int cnt = 0; // 連なる.やxをグループ分け for(int i = 0; i < N+2; i++){ for(int j = 0; j < M+2; j++){ if(checked[i][j]!=-1) continue; char c = grid[i][j]; int add = 0; if(c == '.'){ Flag.push_back(0); add = 2;} else{ Flag.push_back(1); add = 1;} queue<pii> q; q.push({i,j}); while(q.size()){ int x,y; tie(y,x) = q.front(); q.pop(); if(checked[y][x]!=-1) continue; checked[y][x] = cnt; for(int k = 0; k < 8; k+=add){ int nx = x + dx[k]; int ny = y + dy[k]; if(ny < 0 || nx < 0 || ny >= N+2 || nx >= M+2) continue; if(checked[ny][nx]!=-1) continue; if(grid[ny][nx] != c) continue; q.push({ny,nx}); } } cnt++; } } G.resize(cnt); // グループ分けしたものからグラフを作る for(int i = 0; i < N+2; i++){ for(int j = 0; j < M+2; j++){ mp[checked[i][j]]++; int S = checked[i][j]; for(int k = 0; k < 8; k+=2){ int nx = j + dx[k]; int ny = i + dy[k]; if(ny < 0 || nx < 0 || ny >= N+2 || nx >= M+2) continue; if(checked[i][j] == checked[ny][nx]) continue; int T = checked[ny][nx]; G[S].insert(T); G[T].insert(S); } } } auto ret = rec(0); res = max(ret.first,ret.second); return res; } int main(void) { cin.tie(0); ios_base::sync_with_stdio(false); cout << solve() << endl; return 0; }