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답안 #647248

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
647248 2022-10-02T03:46:23 Z GusterGoose27 Worst Reporter 4 (JOI21_worst_reporter4) C++11
100 / 100
 343 ms 43920 KB 
#include <bits/stdc++.h>

#define int long long

using namespace std;

typedef long long ll;

const int MAXN = 2e5;
const int MXVAL = 1e9;
int n;
int ratings[MAXN];
int indeg[MAXN];
vector<int> in_edges[MAXN];
int out_val[MAXN];
int costs[MAXN];
bool vis[MAXN];
ll ans = 0;

class slopeset {
public:
	map<int, ll> slopes; // positive values
	ll init_val = 0;
	slopeset(ll ival = 0) {
		init_val = ival;
	}
	void merge(slopeset *other) {
		init_val += other->init_val;
		for (auto it: other->slopes) {
			slopes[it.first] += it.second;
		}
		delete other;
	}
	void insert(int p, ll c_diff) { // it is c_diff cheaper at point p
		ll r = c_diff;
		auto nval = slopes.upper_bound(p);
		while (nval != slopes.end() && nval->second <= r) {
			r -= nval->second;
			slopes.erase(nval);
			nval = slopes.upper_bound(p);
		}
		if (nval != slopes.end()) slopes[nval->first] -= r;
		slopes[p] += c_diff;
	}
	int size() {
		return slopes.size();
	}
};

slopeset *ssets[MAXN];

void prune(int cur) {
	vis[cur] = 1;
	ssets[cur] = new slopeset(costs[cur]);
	for (int nxt: in_edges[cur]) {
		if (ssets[nxt]->size() > ssets[cur]->size()) {
			ssets[nxt]->merge(ssets[cur]);
			ssets[cur] = ssets[nxt];
		}
		else ssets[cur]->merge(ssets[nxt]);
	}
	ssets[cur]->insert(ratings[cur], costs[cur]);
	int nxt = out_val[cur];
	indeg[nxt]--;
	if (!indeg[nxt]) prune(nxt);
}

slopeset *sset;

void collect_vals(int cur, map<int, ll> &saved) {
	vis[cur] = 1;
	for (int nxt: in_edges[cur]) {
		if (indeg[nxt]) continue;
		if (ssets[nxt]->size() > sset->size()) {
			ssets[nxt]->merge(sset);
			sset = ssets[nxt];
		}
		else sset->merge(ssets[nxt]);
	}
	sset->init_val += costs[cur];
	saved[ratings[cur]] += costs[cur];
	if (!vis[out_val[cur]]) collect_vals(out_val[cur], saved);
}

void add_to(int cur) {
	map<int, ll> saved; // amount saved by choosing this value
	sset = new slopeset();
	collect_vals(cur, saved);
	if (saved.find(MXVAL) == saved.end()) saved[MXVAL] = 0;
	ll cur_costs = sset->init_val;
	auto spos = sset->slopes.begin();
	ll best = -1;
	for (auto it: saved) {
		while (spos != sset->slopes.end() && spos->first <= it.first) {
			cur_costs -= spos->second;
			spos++;
		}
		if (best == -1 || cur_costs-it.second < best) best = cur_costs-it.second;
	}
	ans += best;
}

ll bash(vector<int> &vals, ll c = 0) {
	if (vals.size() == n) {
		for (int i = 0; i < n; i++) {
			if (vals[out_val[i]] > vals[i]) return -1;
		}
		return c;
	}
	ll best = -1;
	int p = vals.size();
	for (int i = 1; i <= 10; i++) {
		vals.push_back(i);
		if (i != MXVAL+1-ratings[p]) c += costs[p];
		ll cval = bash(vals, c);
		if (best == -1 || (cval != -1 && cval < best)) best = cval;
		if (i != MXVAL+1-ratings[p]) c -= costs[p];
		vals.pop_back();
	}
	return best;
}

ll solve() {
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	//ifstream fin("report.in");
	cin >> n;
	ans = 0;
	for (int i = 0; i < n; i++) {
		indeg[i] = 0;
		in_edges[i].clear();
		vis[i] = 0;
	}
	for (int i = 0; i < n; i++) {
		int a;
		cin >> a >> ratings[i] >> costs[i];
		a--;
		ratings[i] = MXVAL+1-ratings[i];
		indeg[a]++;
		in_edges[a].push_back(i);
		out_val[i] = a;
	}
	for (int i = 0; i < n; i++) {
		if (!vis[i] && indeg[i] == 0) prune(i);
	}
	for (int i = 0; i < n; i++) {
		if (!vis[i]) add_to(i);
	}
	//fin.close();
	return ans;
}

void gen_case() {
	int N = 6;
	ofstream fout("report.in");
	fout << N << "\n";
	for (int i = 0; i < N; i++) {
		fout << (1+(rand() % N)) << " " << (1+(rand() % 10)) << " " << (1+(rand() % 10)) << "\n";
	}
	fout.close();
}

signed main() {
	// srand(time(0));
	// vector<int> v;
	ll ans = solve();
	// ll b = bash(v);
	// cout << ans << " " << b << endl;
	// while (1) {
	// 	gen_case();
	// 	ll ans = solve();
	// 	ll b = bash(v);
	// 	assert(ans == b);
	// }
	cout << ans << "\n";
}

Compilation message

worst_reporter2.cpp: In function 'll bash(std::vector<long long int>&, ll)':
worst_reporter2.cpp:104:18: warning: comparison of integer expressions of different signedness: 'std::vector<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  104 |  if (vals.size() == n) {
      |      ~~~~~~~~~~~~^~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 7 ms 5556 KB Output is correct
6 Correct 6 ms 5588 KB Output is correct
7 Correct 6 ms 5588 KB Output is correct
8 Correct 7 ms 5676 KB Output is correct
9 Correct 6 ms 5644 KB Output is correct
10 Correct 6 ms 5588 KB Output is correct
11 Correct 5 ms 5552 KB Output is correct
12 Correct 6 ms 5460 KB Output is correct
13 Correct 5 ms 5428 KB Output is correct
14 Correct 6 ms 5488 KB Output is correct
15 Correct 6 ms 5460 KB Output is correct
16 Correct 7 ms 5684 KB Output is correct
17 Correct 7 ms 5460 KB Output is correct
18 Correct 5 ms 5332 KB Output is correct
19 Correct 7 ms 5684 KB Output is correct
20 Correct 5 ms 5668 KB Output is correct
21 Correct 5 ms 5660 KB Output is correct
22 Correct 6 ms 5972 KB Output is correct
23 Correct 5 ms 5972 KB Output is correct
24 Correct 6 ms 5676 KB Output is correct
25 Correct 6 ms 5680 KB Output is correct
26 Correct 5 ms 5460 KB Output is correct
27 Correct 6 ms 5844 KB Output is correct
28 Correct 5 ms 5716 KB Output is correct
29 Correct 6 ms 5680 KB Output is correct
30 Correct 6 ms 5972 KB Output is correct
31 Correct 6 ms 5972 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 7 ms 5556 KB Output is correct
6 Correct 6 ms 5588 KB Output is correct
7 Correct 6 ms 5588 KB Output is correct
8 Correct 7 ms 5676 KB Output is correct
9 Correct 6 ms 5644 KB Output is correct
10 Correct 6 ms 5588 KB Output is correct
11 Correct 5 ms 5552 KB Output is correct
12 Correct 6 ms 5460 KB Output is correct
13 Correct 5 ms 5428 KB Output is correct
14 Correct 6 ms 5488 KB Output is correct
15 Correct 6 ms 5460 KB Output is correct
16 Correct 7 ms 5684 KB Output is correct
17 Correct 7 ms 5460 KB Output is correct
18 Correct 5 ms 5332 KB Output is correct
19 Correct 7 ms 5684 KB Output is correct
20 Correct 5 ms 5668 KB Output is correct
21 Correct 5 ms 5660 KB Output is correct
22 Correct 6 ms 5972 KB Output is correct
23 Correct 5 ms 5972 KB Output is correct
24 Correct 6 ms 5676 KB Output is correct
25 Correct 6 ms 5680 KB Output is correct
26 Correct 5 ms 5460 KB Output is correct
27 Correct 6 ms 5844 KB Output is correct
28 Correct 5 ms 5716 KB Output is correct
29 Correct 6 ms 5680 KB Output is correct
30 Correct 6 ms 5972 KB Output is correct
31 Correct 6 ms 5972 KB Output is correct
32 Correct 8 ms 5684 KB Output is correct
33 Correct 343 ms 34348 KB Output is correct
34 Correct 252 ms 32884 KB Output is correct
35 Correct 337 ms 32948 KB Output is correct
36 Correct 257 ms 32844 KB Output is correct
37 Correct 166 ms 30492 KB Output is correct
38 Correct 148 ms 28364 KB Output is correct
39 Correct 135 ms 24408 KB Output is correct
40 Correct 122 ms 24400 KB Output is correct
41 Correct 88 ms 24404 KB Output is correct
42 Correct 134 ms 24596 KB Output is correct
43 Correct 128 ms 24584 KB Output is correct
44 Correct 253 ms 33520 KB Output is correct
45 Correct 173 ms 21836 KB Output is correct
46 Correct 87 ms 21196 KB Output is correct
47 Correct 198 ms 33700 KB Output is correct
48 Correct 108 ms 33704 KB Output is correct
49 Correct 93 ms 33672 KB Output is correct
50 Correct 192 ms 43920 KB Output is correct
51 Correct 95 ms 43836 KB Output is correct
52 Correct 215 ms 34580 KB Output is correct
53 Correct 105 ms 34608 KB Output is correct
54 Correct 89 ms 24528 KB Output is correct
55 Correct 169 ms 33808 KB Output is correct
56 Correct 168 ms 31804 KB Output is correct
57 Correct 136 ms 33196 KB Output is correct
58 Correct 170 ms 42444 KB Output is correct
59 Correct 156 ms 42456 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 3 ms 4948 KB Output is correct
3 Correct 3 ms 4948 KB Output is correct
4 Correct 2 ms 4948 KB Output is correct
5 Correct 7 ms 5556 KB Output is correct
6 Correct 6 ms 5588 KB Output is correct
7 Correct 6 ms 5588 KB Output is correct
8 Correct 7 ms 5676 KB Output is correct
9 Correct 6 ms 5644 KB Output is correct
10 Correct 6 ms 5588 KB Output is correct
11 Correct 5 ms 5552 KB Output is correct
12 Correct 6 ms 5460 KB Output is correct
13 Correct 5 ms 5428 KB Output is correct
14 Correct 6 ms 5488 KB Output is correct
15 Correct 6 ms 5460 KB Output is correct
16 Correct 7 ms 5684 KB Output is correct
17 Correct 7 ms 5460 KB Output is correct
18 Correct 5 ms 5332 KB Output is correct
19 Correct 7 ms 5684 KB Output is correct
20 Correct 5 ms 5668 KB Output is correct
21 Correct 5 ms 5660 KB Output is correct
22 Correct 6 ms 5972 KB Output is correct
23 Correct 5 ms 5972 KB Output is correct
24 Correct 6 ms 5676 KB Output is correct
25 Correct 6 ms 5680 KB Output is correct
26 Correct 5 ms 5460 KB Output is correct
27 Correct 6 ms 5844 KB Output is correct
28 Correct 5 ms 5716 KB Output is correct
29 Correct 6 ms 5680 KB Output is correct
30 Correct 6 ms 5972 KB Output is correct
31 Correct 6 ms 5972 KB Output is correct
32 Correct 8 ms 5684 KB Output is correct
33 Correct 343 ms 34348 KB Output is correct
34 Correct 252 ms 32884 KB Output is correct
35 Correct 337 ms 32948 KB Output is correct
36 Correct 257 ms 32844 KB Output is correct
37 Correct 166 ms 30492 KB Output is correct
38 Correct 148 ms 28364 KB Output is correct
39 Correct 135 ms 24408 KB Output is correct
40 Correct 122 ms 24400 KB Output is correct
41 Correct 88 ms 24404 KB Output is correct
42 Correct 134 ms 24596 KB Output is correct
43 Correct 128 ms 24584 KB Output is correct
44 Correct 253 ms 33520 KB Output is correct
45 Correct 173 ms 21836 KB Output is correct
46 Correct 87 ms 21196 KB Output is correct
47 Correct 198 ms 33700 KB Output is correct
48 Correct 108 ms 33704 KB Output is correct
49 Correct 93 ms 33672 KB Output is correct
50 Correct 192 ms 43920 KB Output is correct
51 Correct 95 ms 43836 KB Output is correct
52 Correct 215 ms 34580 KB Output is correct
53 Correct 105 ms 34608 KB Output is correct
54 Correct 89 ms 24528 KB Output is correct
55 Correct 169 ms 33808 KB Output is correct
56 Correct 168 ms 31804 KB Output is correct
57 Correct 136 ms 33196 KB Output is correct
58 Correct 170 ms 42444 KB Output is correct
59 Correct 156 ms 42456 KB Output is correct
60 Correct 3 ms 4948 KB Output is correct
61 Correct 3 ms 4948 KB Output is correct
62 Correct 2 ms 5028 KB Output is correct
63 Correct 3 ms 4948 KB Output is correct
64 Correct 338 ms 31548 KB Output is correct
65 Correct 250 ms 31428 KB Output is correct
66 Correct 296 ms 32016 KB Output is correct
67 Correct 244 ms 31488 KB Output is correct
68 Correct 185 ms 29152 KB Output is correct
69 Correct 160 ms 27436 KB Output is correct
70 Correct 226 ms 31484 KB Output is correct
71 Correct 140 ms 22864 KB Output is correct
72 Correct 265 ms 35324 KB Output is correct
73 Correct 135 ms 22920 KB Output is correct
74 Correct 288 ms 33820 KB Output is correct
75 Correct 183 ms 33740 KB Output is correct
76 Correct 161 ms 33748 KB Output is correct
77 Correct 206 ms 36540 KB Output is correct
78 Correct 130 ms 34540 KB Output is correct
79 Correct 283 ms 34176 KB Output is correct
80 Correct 188 ms 28748 KB Output is correct
81 Correct 151 ms 27424 KB Output is correct
82 Correct 201 ms 35584 KB Output is correct
83 Correct 95 ms 35276 KB Output is correct
84 Correct 242 ms 35000 KB Output is correct
85 Correct 230 ms 34784 KB Output is correct
86 Correct 230 ms 31564 KB Output is correct
87 Correct 236 ms 34988 KB Output is correct
88 Correct 230 ms 34844 KB Output is correct