結果
問題 | No.421 しろくろチョコレート |
ユーザー |
|
提出日時 | 2016-11-22 10:09:03 |
言語 | D (dmd 2.109.1) |
結果 |
AC
|
実行時間 | 31 ms / 2,000 ms |
コード長 | 2,245 bytes |
コンパイル時間 | 746 ms |
コンパイル使用メモリ | 111,924 KB |
実行使用メモリ | 33,992 KB |
最終ジャッジ日時 | 2024-06-12 05:10:46 |
合計ジャッジ時間 | 2,676 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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ファイルパターン | 結果 |
---|---|
other | AC * 65 |
ソースコード
import std.stdio;import std.array;import std.string;import std.conv;import std.algorithm;import std.typecons;import std.range;import std.random;import std.math;import std.container;import std.numeric;class FordFulkerson {int N, source, sink;int[][] adj;int[][] flow;bool[] used;this(int n, int s, int t) {N = n;source = s;sink = t;assert (s >= 0 && s < N && t >= 0 && t < N);adj = new int[][](N);flow = new int[][](N, N);used = new bool[](N);}void add_edge(int from, int to, int cap) {adj[from] ~= to;adj[to] ~= from;flow[from][to] = cap;}int dfs(int v, int min_cap) {if (v == sink)return min_cap;if (used[v])return 0;used[v] = true;foreach (to; adj[v]) {if (!used[to] && flow[v][to] > 0) {auto bottleneck = dfs(to, min(min_cap, flow[v][to]));if (bottleneck == 0) continue;flow[v][to] -= bottleneck;flow[to][v] += bottleneck;return bottleneck;}}return 0;}int run() {int ret = 0;while (true) {foreach (i; 0..N) used[i] = false;int f = dfs(source, int.max);if (f > 0)ret += f;elsereturn ret;}}}void main() {auto input = readln.split.map!(to!int);auto H = input[0];auto W = input[1];auto B = iota(H).map!(_ => readln.chomp).array;auto source = H*W, sink = H*W+1;auto ff = new FordFulkerson(H*W+2, source, sink);int[4] dx = [0, 0, -1, 1];int[4] dy = [-1, 1, 0, 0];auto count_b = 0, count_c = 0;foreach (i; 0..H*W) {auto r = i / W;auto c = i % W;if (B[r][c] == 'b') {count_b += 1;ff.add_edge(source, i, 1);foreach (d; 0..4) {auto nr = r + dx[d];auto nc = c + dy[d];auto j = nr * W + nc;if (nr >= 0 && nr < H && nc >= 0 && nc < W && B[nr][nc] == 'w')ff.add_edge(i, j, 1);}}else if (B[r][c] == 'w') {count_c += 1;ff.add_edge(i, sink, 1);}}auto pairs = ff.run();auto amari_pairs = min(count_b, count_c) - pairs;auto single = max(count_b, count_c) - pairs - amari_pairs;writeln(pairs*100 + amari_pairs*10 + single);}