結果

問題 No.1288 yuki collection
ユーザー kaikeykaikey
提出日時 2020-11-13 22:40:58
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
TLE  
実行時間 -
コード長 4,407 bytes
コンパイル時間 2,169 ms
コンパイル使用メモリ 191,432 KB
実行使用メモリ 57,728 KB
最終ジャッジ日時 2024-07-22 21:41:35
合計ジャッジ時間 54,932 ms
ジャッジサーバーID
(参考情報)
judge4 / judge1
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
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 3 ms
5,376 KB
testcase_09 AC 3 ms
5,376 KB
testcase_10 AC 3 ms
5,376 KB
testcase_11 AC 3 ms
5,376 KB
testcase_12 AC 3 ms
5,376 KB
testcase_13 AC 2,876 ms
34,704 KB
testcase_14 AC 2,901 ms
34,616 KB
testcase_15 AC 1,954 ms
29,264 KB
testcase_16 AC 2,031 ms
29,260 KB
testcase_17 AC 2,899 ms
34,152 KB
testcase_18 AC 2,807 ms
34,760 KB
testcase_19 AC 2,806 ms
34,492 KB
testcase_20 AC 2,887 ms
35,132 KB
testcase_21 AC 3,867 ms
47,284 KB
testcase_22 AC 3,919 ms
47,292 KB
testcase_23 AC 3,767 ms
46,536 KB
testcase_24 AC 3,063 ms
34,788 KB
testcase_25 AC 2,878 ms
35,392 KB
testcase_26 AC 2,847 ms
34,984 KB
testcase_27 AC 756 ms
20,480 KB
testcase_28 AC 1,265 ms
28,548 KB
testcase_29 AC 1,289 ms
31,268 KB
testcase_30 AC 125 ms
32,384 KB
testcase_31 AC 183 ms
33,280 KB
testcase_32 AC 195 ms
32,512 KB
testcase_33 TLE -
testcase_34 -- -
testcase_35 -- -
testcase_36 -- -
testcase_37 -- -
testcase_38 -- -
testcase_39 -- -
testcase_40 -- -
testcase_41 -- -
testcase_42 -- -
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>
#include <random>
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef pair<lint, lint> plint; typedef pair<double long, double long> pld;
#define ALL(x) (x).begin(), (x).end()
#define SZ(x) ((lint)(x).size())
#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)
#define endk '\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; }
lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }
lint ceil(lint a, lint b) { return (a + b - 1) / b; }
lint digit(lint a) { return (lint)log10(a); }
const lint MOD = 1e9 + 7, INF = 1e15;
lint dx[8] = { 1, 0, -1, 0, 1, -1, 1, -1 }, dy[8] = { 0, 1, 0, -1, -1, -1, 1, 1 };
void YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; }
typedef pair<lint, string> Pa;
typedef pair<lint, plint> tlint;


template<typename flow_t, typename cost_t>
struct Flow {
	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 N;
map<char, lint> mp;
int main() {
	mp['y'] = 0;
	mp['u'] = 1;
	mp['k'] = 2;
	mp['i'] = 3;
	lint N;
	cin >> N;
	string str;
	cin >> str;
	vector<lint> arr(N);
	REP(i, N) {
		cin >> arr[i];
	}
	lint s = 2 * N, t = s + 1;
	Flow<lint, lint> g(2 * N + 2);
	REP(i, N) {
		if (str[i] == 'y') {
			g.add_edge(s, i, 1, 0);
		}
		if (str[i] == 'i') {
			g.add_edge(N + i, t, 1, 0);
		}
		FOR(j, i + 1, N) {
			if (mp[str[i]] + 1 == mp[str[j]]) {
				g.add_edge(N + i, j, 1, 0);
			}
		}
	}
	REP(i, N) {
		g.add_edge(i, i + N, 1, - arr[i]);
	}
	g.add_edge(s, t, N, 0);
	cout <<  - g.min_cost_flow(s, t, N) << endk;
}
0