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답안 #217005

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
217005 2020-03-28T17:18:33 Z abacaba 별자리 3 (JOI20_constellation3) C++14
100 / 100
 300 ms 39160 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define f first
#define se second
#define pb push_back
#define int long long
#define pii pair<int, int>

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
 
template <typename T> inline T range(T l, T r) {
	return uniform_int_distribution <T>(l, r)(rng);
}
 
template <typename T> void Min(T &a, T b) {
    a = min(a, b);
}
 
template <typename T> void Max(T &a, T b) {
    a = max(a, b);
}
 
const int mod = 1e9 + 7;
const int inf = 2e9;
const int N = 2e5 + 15;
int n, m, a[N];

struct fenw {
	int t[N];
	inline void inc(int i, int val) {
		for(; i <= n; i = (i | (i + 1)))
			t[i] += val;
	}
	inline int get(int i) {
		int res = 0;
		for(; i >= 1; i = (i & (i + 1)) - 1)
			res += t[i];
		return res;
	}
	inline void add(int l, int r, int x) {
		inc(l, x);
		inc(r + 1, -x);
	}
} t;

struct dsu {
	int p[N], sz[N], dp[N], ext[N], l[N], r[N];
	inline void init() {
		for(int i = 0; i < N; ++i)
			p[i] = i, sz[i] = 1, dp[i] = 0, ext[i] = 0, l[i] = r[i] = i;
	}
	int find(int v) {
		if(v == p[v])
			return v;
		return p[v] = find(p[v]);
	}
	inline void unio(int a, int b) {
		a = find(a);
		b = find(b);
		if(a != b) {
			if(sz[a] < sz[b])
				swap(a, b);

			t.add(l[b], r[b], dp[a] + ext[a]);
			t.add(l[a], r[a], dp[b] + ext[b]);

			Min(l[a], l[b]);
			Max(r[a], r[b]);

			dp[a] += ext[a] + ext[b] + dp[b];
			ext[a] = ext[b] = 0;

			p[b] = a;
			sz[a] += sz[b];
		}
	}
} st;


vector <pii> star[N];
vector <int> building[N];
int sum;

main() {
	st.init();
	ios_base::sync_with_stdio(0); cout.tie(0); cin.tie(0);
	cin >> n;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
		building[a[i]].pb(i);
	}
	cin >> m;
	for(int i = 1; i <= m; ++i) {
		int x, y, c;
		cin >> x >> y >> c;
		star[y].pb({x, c});
		sum += c;
	}
	for(int y = 1; y <= n; ++y) {
		for(pii x : star[y]) {
			int p = st.find(x.f);
			Max(st.ext[p], t.get(x.f) + x.se - st.dp[p]);
		}
		for(int x : building[y]) {
			if(x > 1 && a[x - 1] <= y)
				st.unio(x-1, x);
			if(x < n && a[x + 1] <= y)
				st.unio(x+1, x);
		}
	}
	for(int i = 2; i <= n; ++i)
		st.unio(i, i - 1);
	cout << sum - st.dp[st.find(1)] - st.ext[st.find(1)] << endl;
	return 0;
}

Compilation message

constellation3.cpp:85:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 19200 KB Output is correct
2 Correct 16 ms 19200 KB Output is correct
3 Correct 15 ms 19200 KB Output is correct
4 Correct 15 ms 19196 KB Output is correct
5 Correct 15 ms 19192 KB Output is correct
6 Correct 17 ms 19200 KB Output is correct
7 Correct 16 ms 19072 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19200 KB Output is correct
10 Correct 18 ms 19200 KB Output is correct
11 Correct 20 ms 19200 KB Output is correct
12 Correct 15 ms 19200 KB Output is correct
13 Correct 15 ms 19200 KB Output is correct
14 Correct 16 ms 19200 KB Output is correct
15 Correct 15 ms 19200 KB Output is correct
16 Correct 15 ms 19200 KB Output is correct
17 Correct 15 ms 19200 KB Output is correct
18 Correct 15 ms 19200 KB Output is correct
19 Correct 15 ms 19200 KB Output is correct
20 Correct 17 ms 19456 KB Output is correct
21 Correct 15 ms 19200 KB Output is correct
22 Correct 15 ms 19200 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 19200 KB Output is correct
2 Correct 16 ms 19200 KB Output is correct
3 Correct 15 ms 19200 KB Output is correct
4 Correct 15 ms 19196 KB Output is correct
5 Correct 15 ms 19192 KB Output is correct
6 Correct 17 ms 19200 KB Output is correct
7 Correct 16 ms 19072 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19200 KB Output is correct
10 Correct 18 ms 19200 KB Output is correct
11 Correct 20 ms 19200 KB Output is correct
12 Correct 15 ms 19200 KB Output is correct
13 Correct 15 ms 19200 KB Output is correct
14 Correct 16 ms 19200 KB Output is correct
15 Correct 15 ms 19200 KB Output is correct
16 Correct 15 ms 19200 KB Output is correct
17 Correct 15 ms 19200 KB Output is correct
18 Correct 15 ms 19200 KB Output is correct
19 Correct 15 ms 19200 KB Output is correct
20 Correct 17 ms 19456 KB Output is correct
21 Correct 15 ms 19200 KB Output is correct
22 Correct 15 ms 19200 KB Output is correct
23 Correct 17 ms 19328 KB Output is correct
24 Correct 16 ms 19328 KB Output is correct
25 Correct 17 ms 19328 KB Output is correct
26 Correct 18 ms 19328 KB Output is correct
27 Correct 17 ms 19328 KB Output is correct
28 Correct 16 ms 19328 KB Output is correct
29 Correct 16 ms 19328 KB Output is correct
30 Correct 17 ms 19328 KB Output is correct
31 Correct 16 ms 19328 KB Output is correct
32 Correct 16 ms 19328 KB Output is correct
33 Correct 16 ms 19328 KB Output is correct
34 Correct 16 ms 19328 KB Output is correct
35 Correct 17 ms 19328 KB Output is correct
36 Correct 16 ms 19328 KB Output is correct
37 Correct 16 ms 19320 KB Output is correct
38 Correct 16 ms 19328 KB Output is correct
39 Correct 16 ms 19328 KB Output is correct
40 Correct 17 ms 19328 KB Output is correct
41 Correct 16 ms 19328 KB Output is correct
42 Correct 16 ms 19328 KB Output is correct
43 Correct 16 ms 19328 KB Output is correct
44 Correct 16 ms 19328 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 15 ms 19200 KB Output is correct
2 Correct 16 ms 19200 KB Output is correct
3 Correct 15 ms 19200 KB Output is correct
4 Correct 15 ms 19196 KB Output is correct
5 Correct 15 ms 19192 KB Output is correct
6 Correct 17 ms 19200 KB Output is correct
7 Correct 16 ms 19072 KB Output is correct
8 Correct 16 ms 19200 KB Output is correct
9 Correct 15 ms 19200 KB Output is correct
10 Correct 18 ms 19200 KB Output is correct
11 Correct 20 ms 19200 KB Output is correct
12 Correct 15 ms 19200 KB Output is correct
13 Correct 15 ms 19200 KB Output is correct
14 Correct 16 ms 19200 KB Output is correct
15 Correct 15 ms 19200 KB Output is correct
16 Correct 15 ms 19200 KB Output is correct
17 Correct 15 ms 19200 KB Output is correct
18 Correct 15 ms 19200 KB Output is correct
19 Correct 15 ms 19200 KB Output is correct
20 Correct 17 ms 19456 KB Output is correct
21 Correct 15 ms 19200 KB Output is correct
22 Correct 15 ms 19200 KB Output is correct
23 Correct 17 ms 19328 KB Output is correct
24 Correct 16 ms 19328 KB Output is correct
25 Correct 17 ms 19328 KB Output is correct
26 Correct 18 ms 19328 KB Output is correct
27 Correct 17 ms 19328 KB Output is correct
28 Correct 16 ms 19328 KB Output is correct
29 Correct 16 ms 19328 KB Output is correct
30 Correct 17 ms 19328 KB Output is correct
31 Correct 16 ms 19328 KB Output is correct
32 Correct 16 ms 19328 KB Output is correct
33 Correct 16 ms 19328 KB Output is correct
34 Correct 16 ms 19328 KB Output is correct
35 Correct 17 ms 19328 KB Output is correct
36 Correct 16 ms 19328 KB Output is correct
37 Correct 16 ms 19320 KB Output is correct
38 Correct 16 ms 19328 KB Output is correct
39 Correct 16 ms 19328 KB Output is correct
40 Correct 17 ms 19328 KB Output is correct
41 Correct 16 ms 19328 KB Output is correct
42 Correct 16 ms 19328 KB Output is correct
43 Correct 16 ms 19328 KB Output is correct
44 Correct 16 ms 19328 KB Output is correct
45 Correct 292 ms 36984 KB Output is correct
46 Correct 253 ms 36856 KB Output is correct
47 Correct 274 ms 37368 KB Output is correct
48 Correct 252 ms 36856 KB Output is correct
49 Correct 248 ms 36728 KB Output is correct
50 Correct 286 ms 36728 KB Output is correct
51 Correct 300 ms 36788 KB Output is correct
52 Correct 281 ms 37240 KB Output is correct
53 Correct 258 ms 36968 KB Output is correct
54 Correct 194 ms 39160 KB Output is correct
55 Correct 194 ms 39148 KB Output is correct
56 Correct 184 ms 38652 KB Output is correct
57 Correct 187 ms 38776 KB Output is correct
58 Correct 190 ms 34680 KB Output is correct
59 Correct 170 ms 34552 KB Output is correct
60 Correct 139 ms 37752 KB Output is correct
61 Correct 140 ms 33640 KB Output is correct
62 Correct 192 ms 36728 KB Output is correct
63 Correct 133 ms 32568 KB Output is correct
64 Correct 138 ms 33524 KB Output is correct
65 Correct 181 ms 36472 KB Output is correct
66 Correct 142 ms 32836 KB Output is correct