結果

問題 No.421 しろくろチョコレート
ユーザー koba-e964koba-e964
提出日時 2016-09-10 00:27:18
言語 C++11
(gcc 11.4.0)
結果
AC  
実行時間 6 ms / 2,000 ms
コード長 4,256 bytes
コンパイル時間 1,102 ms
コンパイル使用メモリ 105,488 KB
実行使用メモリ 4,348 KB
最終ジャッジ日時 2023-10-24 14:48:08
合計ジャッジ時間 2,658 ms
ジャッジサーバーID
(参考情報)
judge15 / judge14
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 1 ms
4,348 KB
testcase_01 AC 3 ms
4,348 KB
testcase_02 AC 2 ms
4,348 KB
testcase_03 AC 2 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 2 ms
4,348 KB
testcase_09 AC 2 ms
4,348 KB
testcase_10 AC 1 ms
4,348 KB
testcase_11 AC 3 ms
4,348 KB
testcase_12 AC 1 ms
4,348 KB
testcase_13 AC 1 ms
4,348 KB
testcase_14 AC 1 ms
4,348 KB
testcase_15 AC 1 ms
4,348 KB
testcase_16 AC 4 ms
4,348 KB
testcase_17 AC 4 ms
4,348 KB
testcase_18 AC 5 ms
4,348 KB
testcase_19 AC 1 ms
4,348 KB
testcase_20 AC 3 ms
4,348 KB
testcase_21 AC 4 ms
4,348 KB
testcase_22 AC 3 ms
4,348 KB
testcase_23 AC 1 ms
4,348 KB
testcase_24 AC 2 ms
4,348 KB
testcase_25 AC 1 ms
4,348 KB
testcase_26 AC 2 ms
4,348 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 2 ms
4,348 KB
testcase_31 AC 4 ms
4,348 KB
testcase_32 AC 2 ms
4,348 KB
testcase_33 AC 2 ms
4,348 KB
testcase_34 AC 2 ms
4,348 KB
testcase_35 AC 2 ms
4,348 KB
testcase_36 AC 2 ms
4,348 KB
testcase_37 AC 4 ms
4,348 KB
testcase_38 AC 5 ms
4,348 KB
testcase_39 AC 2 ms
4,348 KB
testcase_40 AC 3 ms
4,348 KB
testcase_41 AC 2 ms
4,348 KB
testcase_42 AC 2 ms
4,348 KB
testcase_43 AC 2 ms
4,348 KB
testcase_44 AC 4 ms
4,348 KB
testcase_45 AC 2 ms
4,348 KB
testcase_46 AC 2 ms
4,348 KB
testcase_47 AC 3 ms
4,348 KB
testcase_48 AC 4 ms
4,348 KB
testcase_49 AC 2 ms
4,348 KB
testcase_50 AC 2 ms
4,348 KB
testcase_51 AC 3 ms
4,348 KB
testcase_52 AC 2 ms
4,348 KB
testcase_53 AC 2 ms
4,348 KB
testcase_54 AC 2 ms
4,348 KB
testcase_55 AC 2 ms
4,348 KB
testcase_56 AC 2 ms
4,348 KB
testcase_57 AC 2 ms
4,348 KB
testcase_58 AC 3 ms
4,348 KB
testcase_59 AC 2 ms
4,348 KB
testcase_60 AC 6 ms
4,348 KB
testcase_61 AC 5 ms
4,348 KB
testcase_62 AC 1 ms
4,348 KB
testcase_63 AC 2 ms
4,348 KB
testcase_64 AC 1 ms
4,348 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In member function ‘void Dinic::add_edge(int, int, int)’:
main.cpp:118:62: warning: narrowing conversion of ‘(&((Dinic*)this)->Dinic::graph.std::vector<std::vector<Dinic::edge> >::operator[](((std::vector<std::vector<Dinic::edge> >::size_type)to)))->std::vector<Dinic::edge>::size()’ from ‘std::vector<Dinic::edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
  118 |         graph[from].push_back((edge) {to, cap, graph[to].size()});
      |                                                ~~~~~~~~~~~~~~^~
main.cpp:119:65: warning: narrowing conversion of ‘((&((Dinic*)this)->Dinic::graph.std::vector<std::vector<Dinic::edge> >::operator[](((std::vector<std::vector<Dinic::edge> >::size_type)from)))->std::vector<Dinic::edge>::size() - 1)’ from ‘std::vector<Dinic::edge>::size_type’ {aka ‘long unsigned int’} to ‘int’ [-Wnarrowing]
  119 |         graph[to].push_back((edge) {from, 0, graph[from].size() - 1});
      |                                              ~~~~~~~~~~~~~~~~~~~^~~

ソースコード

diff #

#include <algorithm>
#include <bitset>
#include <cassert>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>

#define REP(i,s,n) for(int i=(int)(s);i<(int)(n);i++)

using namespace std;
typedef long long int ll;
typedef vector<int> VI;
typedef vector<ll> VL;
typedef pair<int, int> PI;
const ll mod = 1e9 + 7;
const int DEBUG = 1;

const int N = 51;
string s[N];
int n, m;
pair<int, VL> check(int row) {
  int k = 0;
  VL t;
  int cur = 0;
  int cnt = 0;
  REP(i, 0, m + 1) {
    if (i < m && s[row][i] != '.') {
      if (cnt == 0) {
	cur = i;
      }
      cnt++;
    } else {
      k += cnt / 2;
      if (cnt % 2 != 0) {
	ll acc = 0;
	REP(j, 0, cnt / 2 + 1) {
	  acc |= 1LL << (cur + 2 * j);
	}
	t.push_back(acc);
      }
      cnt = 0;
    }
  }
  return pair<int, VL>(k, t);
}

/**
 * Dinic's algorithm for maximum flow problem.
 * Header requirement: vector, queue
 * Verified by: ABC010-D(http://abc010.contest.atcoder.jp/submissions/602810)
 */
class Dinic {
private:
    struct edge {
        int to, cap, rev; // rev is the position of reverse edge in graph[to]
    };
    std::vector<std::vector<edge> > graph;
    std::vector<int> level;
    std::vector<int> iter;
    /* Perform bfs and calculate distance from s */
    void bfs(int s) {
        level.assign(level.size(), -1);
        std::queue<int> que;
        level[s] = 0;
        que.push(s);
        while (! que.empty()) {
            int v = que.front(); que.pop();
            for (int i = 0; i < graph[v].size(); ++i) {
                edge &e = graph[v][i];
                if (e.cap > 0 && level[e.to] == -1) {
                    level[e.to] = level[v] + 1;
                    que.push(e.to);
                }
            }
        }
    }
    /* search augment path by dfs.
     if f == -1, f is treated as infinity. */
    int dfs(int v, int t, int f) {
        if (v == t) {
            return f;
        }
        for (int &i = iter[v]; i < graph[v].size(); ++i) {
            edge &e = graph[v][i];
            if (e.cap > 0 && level[v] < level[e.to]) {
                int newf = f == -1 ? e.cap : std::min(f, e.cap);
                int d = dfs(e.to, t, newf);
                if (d > 0) {
                    e.cap -= d;
                    graph[e.to][e.rev].cap += d;
                    return d;
                }
            }
        }
        return 0;
    }
public:
    /* v is the number of vertices (labeled from 0 .. v-1) */
    Dinic(int v) : graph(v), level(v, -1), iter(v, 0) {}
    void add_edge(int from, int to, int cap) {
        graph[from].push_back((edge) {to, cap, graph[to].size()});
        graph[to].push_back((edge) {from, 0, graph[from].size() - 1});
    }
    int max_flow(int s, int t) {
        int flow = 0;
        while (1) {
            bfs(s);
            if (level[t] < 0) {
                return flow;
            }
            iter.assign(iter.size(), 0);
            int f;
            while ((f = dfs(s, t, -1)) > 0) {
                flow += f;
            }
        }
    }
};

int calc(void) {
  Dinic din(n * m + 2);
  REP(i, 0, n) {
    REP(j, 0, m) {
      if (s[i][j] == '.') continue;
      int dxy[5] = {1, 0, -1, 0, 1};
      REP(d, 0, 4) {
	int nx = i + dxy[d];
	int ny = j + dxy[d + 1];
	if (nx < 0 || nx >= n || ny < 0 || ny >= m) {
	  continue;
	}
	if (s[nx][ny] != '.') {
	  if ((i + j) % 2) {
	    din.add_edge(i * m + j, nx * m + ny, 1);
	  } else {
	    din.add_edge(nx * m + ny, i * m + j, 1);
	  }
	}
      }
      if ((i + j) % 2) {
	din.add_edge(n * m, i * m + j, 1);
      } else {
	din.add_edge(i * m + j, n * m + 1, 1);
      }
    }
  }
  return din.max_flow(n * m, n * m + 1);
}

int main(void){
  cin >> n >> m;
  REP(i, 0, n) {
    cin >> s[i];
  }
  int w = 0;
  int b = 0;
  REP(i, 0, n) {
    REP(j, 0, m) {
      if (s[i][j] == 'w') w++;
      if (s[i][j] == 'b') b++;
    }
  }
  int c = calc();
  w -= c;
  b -= c;
  int mi = min(w, b);
  cout << c * 100 + mi * 8 + w + b << endl;
}
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