結果
問題 | No.421 しろくろチョコレート |
ユーザー | kaikey |
提出日時 | 2020-06-03 23:04:12 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 6 ms / 2,000 ms |
コード長 | 4,750 bytes |
コンパイル時間 | 1,841 ms |
コンパイル使用メモリ | 180,496 KB |
実行使用メモリ | 6,944 KB |
最終ジャッジ日時 | 2024-09-23 07:26:25 |
合計ジャッジ時間 | 3,384 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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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
6,812 KB |
testcase_01 | AC | 3 ms
6,940 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | AC | 2 ms
6,940 KB |
testcase_04 | AC | 2 ms
6,944 KB |
testcase_05 | AC | 2 ms
6,940 KB |
testcase_06 | AC | 2 ms
6,940 KB |
testcase_07 | AC | 3 ms
6,940 KB |
testcase_08 | AC | 2 ms
6,944 KB |
testcase_09 | AC | 2 ms
6,940 KB |
testcase_10 | AC | 2 ms
6,944 KB |
testcase_11 | AC | 3 ms
6,940 KB |
testcase_12 | AC | 2 ms
6,940 KB |
testcase_13 | AC | 2 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,944 KB |
testcase_15 | AC | 2 ms
6,940 KB |
testcase_16 | AC | 3 ms
6,940 KB |
testcase_17 | AC | 4 ms
6,944 KB |
testcase_18 | AC | 4 ms
6,944 KB |
testcase_19 | AC | 2 ms
6,944 KB |
testcase_20 | AC | 3 ms
6,944 KB |
testcase_21 | AC | 3 ms
6,940 KB |
testcase_22 | AC | 3 ms
6,944 KB |
testcase_23 | AC | 2 ms
6,940 KB |
testcase_24 | AC | 2 ms
6,940 KB |
testcase_25 | AC | 2 ms
6,940 KB |
testcase_26 | AC | 2 ms
6,940 KB |
testcase_27 | AC | 2 ms
6,940 KB |
testcase_28 | AC | 3 ms
6,940 KB |
testcase_29 | AC | 2 ms
6,944 KB |
testcase_30 | AC | 3 ms
6,944 KB |
testcase_31 | AC | 3 ms
6,940 KB |
testcase_32 | AC | 3 ms
6,940 KB |
testcase_33 | AC | 3 ms
6,944 KB |
testcase_34 | AC | 2 ms
6,940 KB |
testcase_35 | AC | 2 ms
6,944 KB |
testcase_36 | AC | 3 ms
6,940 KB |
testcase_37 | AC | 4 ms
6,944 KB |
testcase_38 | AC | 5 ms
6,940 KB |
testcase_39 | AC | 2 ms
6,944 KB |
testcase_40 | AC | 3 ms
6,940 KB |
testcase_41 | AC | 2 ms
6,940 KB |
testcase_42 | AC | 2 ms
6,944 KB |
testcase_43 | AC | 2 ms
6,940 KB |
testcase_44 | AC | 4 ms
6,940 KB |
testcase_45 | AC | 2 ms
6,940 KB |
testcase_46 | AC | 2 ms
6,940 KB |
testcase_47 | AC | 3 ms
6,940 KB |
testcase_48 | AC | 3 ms
6,944 KB |
testcase_49 | AC | 2 ms
6,944 KB |
testcase_50 | AC | 2 ms
6,940 KB |
testcase_51 | AC | 4 ms
6,940 KB |
testcase_52 | AC | 2 ms
6,940 KB |
testcase_53 | AC | 2 ms
6,940 KB |
testcase_54 | AC | 2 ms
6,940 KB |
testcase_55 | AC | 2 ms
6,944 KB |
testcase_56 | AC | 2 ms
6,940 KB |
testcase_57 | AC | 2 ms
6,940 KB |
testcase_58 | AC | 3 ms
6,940 KB |
testcase_59 | AC | 3 ms
6,944 KB |
testcase_60 | AC | 6 ms
6,944 KB |
testcase_61 | AC | 5 ms
6,940 KB |
testcase_62 | AC | 2 ms
6,944 KB |
testcase_63 | AC | 2 ms
6,940 KB |
testcase_64 | AC | 2 ms
6,944 KB |
ソースコード
#include "bits/stdc++.h" using namespace std; typedef long long int lint; typedef pair<lint, lint> plint; typedef pair<double long, double long> pld; #define Alint(x) (x).begin(), (x).end() #define SZ(x) ((lint)(x).size()) #define POW2(n) (1ll << (n)) #define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;i++) #define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;i--) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } template<typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2>& l, const pair<T1, T2>& r) { return make_pair(l.first + r.first, l.second + r.second); } template<typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2>& l, const pair<T1, T2>& r) { return make_pair(l.first - r.first, l.second - r.second); } const lint MOD = 998244353, INF = 1e9; template<typename flow_t, typename cost_t> struct Flow { const cost_t INF = pow(10, 18); struct edge { lint to; flow_t cap; cost_t cost; lint rev; }; vector<vector<edge> > Graph; vector<cost_t> potential, min_cost; vector<lint> prevv, preve; vector<lint> level; vector<lint> iter; Flow(lint V) :Graph(V) {} void add_edge(lint from, lint to, flow_t cap, cost_t cost = 0) { Graph[from].push_back({ to, cap, cost, SZ(Graph[to]) }); Graph[to].push_back({ from, 0, -cost, SZ(Graph[from]) - 1 }); } void bfs(lint s) { lint V = SZ(Graph); level.assign(V, -1); queue<lint> que; que.push(s); level[s] = 0; while (!que.empty()) { lint v = que.front(); que.pop(); REP(i, SZ(Graph[v])) { edge& e = Graph[v][i]; if (e.cap > 0 && level[e.to] < 0) { level[e.to] = level[v] + 1; que.push(e.to); } } } } flow_t dfs(lint v, lint t, flow_t f) { if (v == t) return f; for (lint& i = iter[v]; i < SZ(Graph[v]); i++) { edge& e = Graph[v][i]; if (e.cap > 0 && level[v] < level[e.to]) { flow_t d = dfs(e.to, t, min(f, e.cap)); if (d > 0) { e.cap -= d; Graph[e.to][e.rev].cap += d; return d; } } } return 0; } flow_t max_flow(lint s, lint t) { flow_t flow = 0; lint V = SZ(Graph); for (;;) { bfs(s); if (level[t] < 0) return flow; iter.assign(V, 0); flow_t f; while ((f = dfs(s, t, INF)) > 0) { flow += f; } } } lint min_cost_flow(lint s, lint t, lint f) { cost_t res = 0; lint V = SZ(Graph); potential.assign(V, 0); prevv.assign(V, -1); preve.assign(V, -1); while (f > 0) { priority_queue<pair<cost_t, lint>, vector<pair<cost_t, lint> >, greater<pair<cost_t, lint> > > que; min_cost.assign(V, INF); min_cost[s] = 0; que.push({ 0, s }); while (!que.empty()) { pair<cost_t, lint> p = que.top(); que.pop(); lint v = p.second; if (min_cost[v] < p.first) continue; REP(i, SZ(Graph[v])) { edge& e = Graph[v][i]; cost_t nextCost = min_cost[v] + e.cost + potential[v] - potential[e.to]; if (e.cap > 0 && min_cost[e.to] > nextCost) { min_cost[e.to] = nextCost; prevv[e.to] = v; preve[e.to] = i; que.push({ min_cost[e.to], e.to }); } } } if (min_cost[t] == INF) { return -1; } REP(v, V) potential[v] += min_cost[v]; flow_t addflow = f; for (lint v = t; v != s; v = prevv[v]) { addflow = min(addflow, Graph[prevv[v]][preve[v]].cap); } f -= addflow; res += addflow * potential[t]; for (lint v = t; v != s; v = prevv[v]) { edge& e = Graph[prevv[v]][preve[v]]; e.cap -= addflow; Graph[v][e.rev].cap += addflow; } } return res; } }; lint H, W; char char_map[50][50]; int main() { cin.tie(0); ios_base::sync_with_stdio(false); cin >> H >> W; lint s = H * W, t = s + 1; Flow<lint, lint> g(t + 1); lint white_cnt = 0, black_cnt = 0; REP(i, H) { REP(j, W) { cin >> char_map[i][j]; if (char_map[i][j] == 'b') black_cnt++; else if(char_map[i][j] == 'w') white_cnt++; } } REP(i, H) { REP(j, W) { lint idx = i * W + j; if (char_map[i][j] == 'b') { g.add_edge(idx, t, 1); } if (char_map[i][j] == 'w') { g.add_edge(s, idx, 1); lint dx[4] = { 0, 1, 0, -1 }, dy[4] = { 1, 0, -1, 0 }; REP(k, 4) { lint ny = i + dy[k], nx = j + dx[k]; if (nx >= 0 && ny >= 0 && nx < W && ny < H && char_map[ny][nx] == 'b') { g.add_edge(idx, ny * W + nx, 1); } } } } } lint match = g.max_flow(s, t); white_cnt -= match; black_cnt -= match; lint unmatch = min(white_cnt, black_cnt); white_cnt -= unmatch; black_cnt -= unmatch; cout << match * 100 + unmatch * 10 + white_cnt + black_cnt << endl; }