oj.uz

답안 #435641

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
435641 2021-06-23T13:57:55 Z Kevin_Zhang_TW Worst Reporter 4 (JOI21_worst_reporter4) C++17
100 / 100
 459 ms 71272 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
template<class T> void debug(T l, T r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif

const int MAX_N = 300010, inf = 1e9 + 10;

int n;
vector<int> pa, h, c;
vector<int> edge[MAX_N];

// maintain diff
map<int, ll> dp[MAX_N];

void add_pref(int i, int key, ll val) {
	if (val == 0) return;
	dp[i][key] += val;
}
// put dp value into a
void merge(int a, int b) { 
	if (dp[b].size() > dp[a].size()) swap(dp[a], dp[b]);
	// do something
	for (auto [key, val] : dp[b])
		add_pref(a, key, val);
	dp[b].clear();
}
ll qry(map<int,ll>&dp, int x) {
	auto it = dp.lower_bound(x);
	if (it == end(dp)) return 0;
	return it->second;
}

void dfs(int x) {
	for (int u : edge[x])
		dfs(u), merge(x, u);

	dp[x][ h[x] ] += c[x];

	ll v = c[x];
	auto it = dp[x].find(h[x]);

	while (it != begin(dp[x])) {
		ll &d = prev(it)->second;
		if (d <= v) {
			v -= d;
			dp[x].erase(prev(it));
		}
		else {
			d -= v;
			break;
		}
	} 
}
ll cal(vector<int> ring) {
	dp[n].clear();

	for (int x : ring) for (int u : edge[x]) {
		dfs(u);
		merge(n, u);
	}

	ll ret = 0;

	vector<pair<int,ll>> val(AI(dp[n]));
	val.pb(inf, 0);
	for (int i = (int) val.size() - 1;i > 0;--i)
		val[i-1].second += val[i].second; 

	map<int, ll> sum;

	for (int x : ring)
		sum[ h[x] ] += c[x];
	sum[-1] = 0;

	for (auto [k, v] : sum)
		chmax(ret, lower_bound(AI(val), make_pair(k, -1ll))->second + v);

	return ret; 
}

ll min_change_val(int n, vector<int> a, vector<int> h, vector<int> c) {
	::n = n, pa = a, ::h = h, ::c = c;

	ll res = 0;

	vector<int> vis(n), rid(n, -1), on_ring(n);
	
	int cnt_ring = 0;
	for (int i = 0;i < n;++i) if (!vis[i]) {
		vector<int> stk;
		for (int x = i;!vis[x];x = pa[x]) {
			stk.pb(x);
			vis[x] = true;
		}
		DE(i, "stk");
		debug(AI(stk));
		if (rid[ pa[stk.back()] ] == -1) {
			int s = pa[ stk.back() ];
			while (stk.size()) {
				int x = stk.back(); stk.pop_back();
				on_ring[x] = true;
				rid[x] = cnt_ring;
				if (x == s) break;
			}
			++cnt_ring;
		}
		while (stk.size()) {
			int x = stk.back(); stk.pop_back();
			rid[x] = rid[ pa[x] ];
		}
	}
	for (int i = 0;i < n;++i) DE(i, rid[i], on_ring[i]);

	for (int i = 0;i < n;++i) if (!on_ring[i] || !on_ring[ pa[i] ]) {
		DE(i, pa[i]);
		edge[ pa[i] ].pb(i);
	}

	vector<vector<int>> ring(cnt_ring);
	for (int i = 0;i < n;++i) if (on_ring[i])
		ring[ rid[i] ].pb(i);

	for (int i = 0;i < cnt_ring;++i) {
		debug(AI(ring[i]));
		res += cal(ring[i]);
	}

	return accumulate(AI(c), 0ll) - res;
}
int32_t main() {
	ios_base::sync_with_stdio(0), cin.tie(0);

	int n;
	cin >> n;
	vector<int> a(n), h(n), c(n);
	for (int i = 0;i < n;++i)
		cin >> a[i] >> h[i] >> c[i], --a[i];

	cout << min_change_val(n, a, h, c) << '\n';
}

Compilation message

worst_reporter2.cpp: In function 'll min_change_val(int, std::vector<int>, std::vector<int>, std::vector<int>)':
worst_reporter2.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
worst_reporter2.cpp:107:3: note: in expansion of macro 'DE'
  107 |   DE(i, "stk");
      |   ^~
worst_reporter2.cpp:15:20: warning: statement has no effect [-Wunused-value]
   15 | #define debug(...) 0
      |                    ^
worst_reporter2.cpp:108:3: note: in expansion of macro 'debug'
  108 |   debug(AI(stk));
      |   ^~~~~
worst_reporter2.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
worst_reporter2.cpp:124:28: note: in expansion of macro 'DE'
  124 |  for (int i = 0;i < n;++i) DE(i, rid[i], on_ring[i]);
      |                            ^~
worst_reporter2.cpp:14:17: warning: statement has no effect [-Wunused-value]
   14 | #define DE(...) 0
      |                 ^
worst_reporter2.cpp:127:3: note: in expansion of macro 'DE'
  127 |   DE(i, pa[i]);
      |   ^~
worst_reporter2.cpp:15:20: warning: statement has no effect [-Wunused-value]
   15 | #define debug(...) 0
      |                    ^
worst_reporter2.cpp:136:3: note: in expansion of macro 'debug'
  136 |   debug(AI(ring[i]));
      |   ^~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 21324 KB Output is correct
2 Correct 15 ms 21452 KB Output is correct
3 Correct 15 ms 21412 KB Output is correct
4 Correct 17 ms 21452 KB Output is correct
5 Correct 24 ms 22256 KB Output is correct
6 Correct 22 ms 21908 KB Output is correct
7 Correct 19 ms 21892 KB Output is correct
8 Correct 23 ms 22228 KB Output is correct
9 Correct 19 ms 21888 KB Output is correct
10 Correct 22 ms 21836 KB Output is correct
11 Correct 18 ms 21820 KB Output is correct
12 Correct 24 ms 22348 KB Output is correct
13 Correct 17 ms 22356 KB Output is correct
14 Correct 27 ms 22076 KB Output is correct
15 Correct 24 ms 22104 KB Output is correct
16 Correct 22 ms 22228 KB Output is correct
17 Correct 23 ms 21900 KB Output is correct
18 Correct 20 ms 21836 KB Output is correct
19 Correct 25 ms 22256 KB Output is correct
20 Correct 26 ms 21976 KB Output is correct
21 Correct 20 ms 21964 KB Output is correct
22 Correct 19 ms 22224 KB Output is correct
23 Correct 21 ms 21844 KB Output is correct
24 Correct 20 ms 22356 KB Output is correct
25 Correct 20 ms 22008 KB Output is correct
26 Correct 19 ms 22348 KB Output is correct
27 Correct 21 ms 22360 KB Output is correct
28 Correct 20 ms 22404 KB Output is correct
29 Correct 22 ms 22608 KB Output is correct
30 Correct 20 ms 22680 KB Output is correct
31 Correct 22 ms 22604 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 21324 KB Output is correct
2 Correct 15 ms 21452 KB Output is correct
3 Correct 15 ms 21412 KB Output is correct
4 Correct 17 ms 21452 KB Output is correct
5 Correct 24 ms 22256 KB Output is correct
6 Correct 22 ms 21908 KB Output is correct
7 Correct 19 ms 21892 KB Output is correct
8 Correct 23 ms 22228 KB Output is correct
9 Correct 19 ms 21888 KB Output is correct
10 Correct 22 ms 21836 KB Output is correct
11 Correct 18 ms 21820 KB Output is correct
12 Correct 24 ms 22348 KB Output is correct
13 Correct 17 ms 22356 KB Output is correct
14 Correct 27 ms 22076 KB Output is correct
15 Correct 24 ms 22104 KB Output is correct
16 Correct 22 ms 22228 KB Output is correct
17 Correct 23 ms 21900 KB Output is correct
18 Correct 20 ms 21836 KB Output is correct
19 Correct 25 ms 22256 KB Output is correct
20 Correct 26 ms 21976 KB Output is correct
21 Correct 20 ms 21964 KB Output is correct
22 Correct 19 ms 22224 KB Output is correct
23 Correct 21 ms 21844 KB Output is correct
24 Correct 20 ms 22356 KB Output is correct
25 Correct 20 ms 22008 KB Output is correct
26 Correct 19 ms 22348 KB Output is correct
27 Correct 21 ms 22360 KB Output is correct
28 Correct 20 ms 22404 KB Output is correct
29 Correct 22 ms 22608 KB Output is correct
30 Correct 20 ms 22680 KB Output is correct
31 Correct 22 ms 22604 KB Output is correct
32 Correct 26 ms 22232 KB Output is correct
33 Correct 394 ms 56216 KB Output is correct
34 Correct 350 ms 39436 KB Output is correct
35 Correct 398 ms 54232 KB Output is correct
36 Correct 329 ms 39444 KB Output is correct
37 Correct 224 ms 39156 KB Output is correct
38 Correct 235 ms 38852 KB Output is correct
39 Correct 179 ms 57964 KB Output is correct
40 Correct 189 ms 57880 KB Output is correct
41 Correct 150 ms 57808 KB Output is correct
42 Correct 174 ms 50220 KB Output is correct
43 Correct 181 ms 50156 KB Output is correct
44 Correct 438 ms 55848 KB Output is correct
45 Correct 282 ms 39404 KB Output is correct
46 Correct 172 ms 38984 KB Output is correct
47 Correct 305 ms 57220 KB Output is correct
48 Correct 195 ms 46832 KB Output is correct
49 Correct 156 ms 46840 KB Output is correct
50 Correct 372 ms 54712 KB Output is correct
51 Correct 135 ms 36196 KB Output is correct
52 Correct 289 ms 57996 KB Output is correct
53 Correct 162 ms 47464 KB Output is correct
54 Correct 145 ms 58132 KB Output is correct
55 Correct 237 ms 60012 KB Output is correct
56 Correct 258 ms 66184 KB Output is correct
57 Correct 265 ms 69612 KB Output is correct
58 Correct 266 ms 71272 KB Output is correct
59 Correct 275 ms 71264 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 18 ms 21324 KB Output is correct
2 Correct 15 ms 21452 KB Output is correct
3 Correct 15 ms 21412 KB Output is correct
4 Correct 17 ms 21452 KB Output is correct
5 Correct 24 ms 22256 KB Output is correct
6 Correct 22 ms 21908 KB Output is correct
7 Correct 19 ms 21892 KB Output is correct
8 Correct 23 ms 22228 KB Output is correct
9 Correct 19 ms 21888 KB Output is correct
10 Correct 22 ms 21836 KB Output is correct
11 Correct 18 ms 21820 KB Output is correct
12 Correct 24 ms 22348 KB Output is correct
13 Correct 17 ms 22356 KB Output is correct
14 Correct 27 ms 22076 KB Output is correct
15 Correct 24 ms 22104 KB Output is correct
16 Correct 22 ms 22228 KB Output is correct
17 Correct 23 ms 21900 KB Output is correct
18 Correct 20 ms 21836 KB Output is correct
19 Correct 25 ms 22256 KB Output is correct
20 Correct 26 ms 21976 KB Output is correct
21 Correct 20 ms 21964 KB Output is correct
22 Correct 19 ms 22224 KB Output is correct
23 Correct 21 ms 21844 KB Output is correct
24 Correct 20 ms 22356 KB Output is correct
25 Correct 20 ms 22008 KB Output is correct
26 Correct 19 ms 22348 KB Output is correct
27 Correct 21 ms 22360 KB Output is correct
28 Correct 20 ms 22404 KB Output is correct
29 Correct 22 ms 22608 KB Output is correct
30 Correct 20 ms 22680 KB Output is correct
31 Correct 22 ms 22604 KB Output is correct
32 Correct 26 ms 22232 KB Output is correct
33 Correct 394 ms 56216 KB Output is correct
34 Correct 350 ms 39436 KB Output is correct
35 Correct 398 ms 54232 KB Output is correct
36 Correct 329 ms 39444 KB Output is correct
37 Correct 224 ms 39156 KB Output is correct
38 Correct 235 ms 38852 KB Output is correct
39 Correct 179 ms 57964 KB Output is correct
40 Correct 189 ms 57880 KB Output is correct
41 Correct 150 ms 57808 KB Output is correct
42 Correct 174 ms 50220 KB Output is correct
43 Correct 181 ms 50156 KB Output is correct
44 Correct 438 ms 55848 KB Output is correct
45 Correct 282 ms 39404 KB Output is correct
46 Correct 172 ms 38984 KB Output is correct
47 Correct 305 ms 57220 KB Output is correct
48 Correct 195 ms 46832 KB Output is correct
49 Correct 156 ms 46840 KB Output is correct
50 Correct 372 ms 54712 KB Output is correct
51 Correct 135 ms 36196 KB Output is correct
52 Correct 289 ms 57996 KB Output is correct
53 Correct 162 ms 47464 KB Output is correct
54 Correct 145 ms 58132 KB Output is correct
55 Correct 237 ms 60012 KB Output is correct
56 Correct 258 ms 66184 KB Output is correct
57 Correct 265 ms 69612 KB Output is correct
58 Correct 266 ms 71272 KB Output is correct
59 Correct 275 ms 71264 KB Output is correct
60 Correct 14 ms 21452 KB Output is correct
61 Correct 22 ms 21452 KB Output is correct
62 Correct 26 ms 21324 KB Output is correct
63 Correct 17 ms 21452 KB Output is correct
64 Correct 459 ms 53052 KB Output is correct
65 Correct 318 ms 40784 KB Output is correct
66 Correct 438 ms 51100 KB Output is correct
67 Correct 338 ms 41232 KB Output is correct
68 Correct 298 ms 40044 KB Output is correct
69 Correct 305 ms 40020 KB Output is correct
70 Correct 263 ms 46104 KB Output is correct
71 Correct 124 ms 37656 KB Output is correct
72 Correct 406 ms 50052 KB Output is correct
73 Correct 127 ms 37712 KB Output is correct
74 Correct 349 ms 54004 KB Output is correct
75 Correct 192 ms 40164 KB Output is correct
76 Correct 178 ms 39976 KB Output is correct
77 Correct 353 ms 51292 KB Output is correct
78 Correct 146 ms 37520 KB Output is correct
79 Correct 355 ms 50652 KB Output is correct
80 Correct 264 ms 38844 KB Output is correct
81 Correct 213 ms 38548 KB Output is correct
82 Correct 394 ms 50312 KB Output is correct
83 Correct 149 ms 46944 KB Output is correct
84 Correct 370 ms 55720 KB Output is correct
85 Correct 326 ms 55824 KB Output is correct
86 Correct 331 ms 52524 KB Output is correct
87 Correct 343 ms 55748 KB Output is correct
88 Correct 365 ms 55732 KB Output is correct