oj.uz

답안 #260541

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
260541 2020-08-10T13:43:20 Z amoo_safar 별자리 3 (JOI20_constellation3) C++17
100 / 100
 1146 ms 89948 KB 
// Zende bad Shoma nasime faghat !
#include <bits/stdc++.h>

#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;

const int N = 2e5 + 10;
const int Log = 20;
const int Inf = 1'000'000'001;

struct Fenwick {
	ll fen[N];
	Fenwick (){
		memset(fen, 0, sizeof fen);
	}

	void Add(int idx, ll d){
		for(; idx < N; idx += (idx & (-idx)))
			fen[idx] += d;
	}
	ll Get(int idx){
		ll res = 0;
		for(; idx; idx -= (idx & (-idx)))
			res += fen[idx];
		return res;
	}
	void AddLR(int L, int R, ll d){
		Add(L, d);
		Add(R, -d);
	}
};

Fenwick fr, fl;

int n, A[N];
pii sp[Log][N];

int BigR(int idx, pii V){
	int res = idx;
	for(int l = Log - 1; l >= 0; l--)
		if(sp[l][res] <= V)
			res += 1 << l;
	return res;
}
int BigL(int idx, pii V){
	int res = idx;
	for(int l = Log - 1; l >= 0; l--)
		if(sp[l][max(0, res - (1 << l) + 1)] <= V)
			res -= 1 << l;
	return res;
}
pii Max(int L, int R){
	L ++;
	pii res = {-1, -1};
	for(int l = Log - 1; l >= 0; l--){
		if(L + (1 << l) <= R){
			res = max(res, sp[l][L]);
			L += 1 << l;
		}
	}
	return res;
}

int m;
int X[N], Y[N], C[N];

map<pii, vector<int> > mp;
map<pii, ll> dp;

int main(){
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> n;
	for(int i = 1; i <= n; i++) cin >> A[i];
	A[0] = A[n + 1] = Inf;
	
	for(int i = 0; i <= n + 1; i++){
		sp[0][i] = pii(A[i], i);
	}
	for(int l = 1; l < Log; l++)
		for(int i = 0; i <= n + 1; i++)
			sp[l][i] = max(sp[l - 1][i], sp[l - 1][min(n + 1, i + (1 << (l-1)) )] );

	vector<pii> seg;
	for(int i = 1; i <= n; i++){
		//cerr << BigL(i, pii(A[i], i)) << ' ' << BigR(i, pii(A[i], i)) << '\n';
		seg.pb({i, BigR(i, pii(A[i], i) )});
		seg.pb({BigL(i, pii(A[i], i) ), i});
	}
	seg.pb({0, n + 1});
	sort(all(seg)); seg.resize(unique(all(seg)) - seg.begin());
	sort(all(seg), [&](pii A, pii B){
		if(A.S - A.F == B.S - B.F) return A.F < B.F;
		return A.S - A.F < B.S - B.F;
	});


	ll Sum = 0;
	cin >> m;
	for(int i = 1; i <= m; i++){
		cin >> X[i] >> Y[i] >> C[i];
		mp[pii( BigL(X[i], pii(Y[i], -1)), BigR(X[i], pii(Y[i], -1)) )].pb(i);
		Sum += C[i];
	}
	//debug("Start");
	ll res;
	
	for(auto [L, R] : seg){
		if(R - L == 1) continue;
		int mx = Max(L, R).S;		
		res = dp[{L, mx}] + dp[{mx, R}];

		vector<int> &V = mp[{L, R}];
		for(auto st : V){
			/*debug(st);
			if(st == 4){
			cerr << fr.Get(X[st]) << " " << fr.Get(R) << '\n';
			cerr << "! " << st << " : " << (fr.Get(X[st]) - fr.Get(R)) << ", " << (fl.Get(X[st]) - fl.Get(L)) << '\n';
			}*/

			res = max(res, C[st] + (fr.Get(X[st]) - fr.Get(R)) + (fl.Get(X[st]) - fl.Get(L)) ) ;
		}
		dp[{L, R}] = res;

		//cerr << L << "->" << R << " : " << res << '\n';
		if(pii(L, R) == pii(0, n + 1)) continue;

		if(pii(A[L], L) < pii(A[R], R) ){
			//cerr << "# " << L  << ' ' << R << ' ' << res << '\n';
			fr.AddLR(BigL(L, pii(A[L], L)) + 1, L + 1, res);
		} else {
			fl.AddLR(R, BigR(R, pii(A[R], R)), res);
		}
	}
	cout << Sum - dp[{0, n + 1}] << '\n';
	return 0;
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3712 KB Output is correct
2 Correct 3 ms 3712 KB Output is correct
3 Correct 3 ms 3712 KB Output is correct
4 Correct 3 ms 3840 KB Output is correct
5 Correct 4 ms 3840 KB Output is correct
6 Correct 3 ms 3712 KB Output is correct
7 Correct 3 ms 3712 KB Output is correct
8 Correct 3 ms 3712 KB Output is correct
9 Correct 3 ms 3712 KB Output is correct
10 Correct 3 ms 3712 KB Output is correct
11 Correct 3 ms 3712 KB Output is correct
12 Correct 3 ms 3712 KB Output is correct
13 Correct 3 ms 3712 KB Output is correct
14 Correct 3 ms 3712 KB Output is correct
15 Correct 3 ms 3712 KB Output is correct
16 Correct 3 ms 3840 KB Output is correct
17 Correct 3 ms 3712 KB Output is correct
18 Correct 3 ms 3712 KB Output is correct
19 Correct 3 ms 3712 KB Output is correct
20 Correct 3 ms 3712 KB Output is correct
21 Correct 3 ms 3712 KB Output is correct
22 Correct 3 ms 3712 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3712 KB Output is correct
2 Correct 3 ms 3712 KB Output is correct
3 Correct 3 ms 3712 KB Output is correct
4 Correct 3 ms 3840 KB Output is correct
5 Correct 4 ms 3840 KB Output is correct
6 Correct 3 ms 3712 KB Output is correct
7 Correct 3 ms 3712 KB Output is correct
8 Correct 3 ms 3712 KB Output is correct
9 Correct 3 ms 3712 KB Output is correct
10 Correct 3 ms 3712 KB Output is correct
11 Correct 3 ms 3712 KB Output is correct
12 Correct 3 ms 3712 KB Output is correct
13 Correct 3 ms 3712 KB Output is correct
14 Correct 3 ms 3712 KB Output is correct
15 Correct 3 ms 3712 KB Output is correct
16 Correct 3 ms 3840 KB Output is correct
17 Correct 3 ms 3712 KB Output is correct
18 Correct 3 ms 3712 KB Output is correct
19 Correct 3 ms 3712 KB Output is correct
20 Correct 3 ms 3712 KB Output is correct
21 Correct 3 ms 3712 KB Output is correct
22 Correct 3 ms 3712 KB Output is correct
23 Correct 7 ms 4480 KB Output is correct
24 Correct 7 ms 4480 KB Output is correct
25 Correct 7 ms 4480 KB Output is correct
26 Correct 7 ms 4480 KB Output is correct
27 Correct 7 ms 4480 KB Output is correct
28 Correct 7 ms 4480 KB Output is correct
29 Correct 7 ms 4480 KB Output is correct
30 Correct 7 ms 4480 KB Output is correct
31 Correct 7 ms 4480 KB Output is correct
32 Correct 7 ms 4480 KB Output is correct
33 Correct 9 ms 4480 KB Output is correct
34 Correct 7 ms 4480 KB Output is correct
35 Correct 7 ms 4480 KB Output is correct
36 Correct 7 ms 4608 KB Output is correct
37 Correct 7 ms 4480 KB Output is correct
38 Correct 10 ms 4480 KB Output is correct
39 Correct 7 ms 4480 KB Output is correct
40 Correct 9 ms 4456 KB Output is correct
41 Correct 7 ms 4480 KB Output is correct
42 Correct 7 ms 4480 KB Output is correct
43 Correct 8 ms 4480 KB Output is correct
44 Correct 9 ms 4480 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 3712 KB Output is correct
2 Correct 3 ms 3712 KB Output is correct
3 Correct 3 ms 3712 KB Output is correct
4 Correct 3 ms 3840 KB Output is correct
5 Correct 4 ms 3840 KB Output is correct
6 Correct 3 ms 3712 KB Output is correct
7 Correct 3 ms 3712 KB Output is correct
8 Correct 3 ms 3712 KB Output is correct
9 Correct 3 ms 3712 KB Output is correct
10 Correct 3 ms 3712 KB Output is correct
11 Correct 3 ms 3712 KB Output is correct
12 Correct 3 ms 3712 KB Output is correct
13 Correct 3 ms 3712 KB Output is correct
14 Correct 3 ms 3712 KB Output is correct
15 Correct 3 ms 3712 KB Output is correct
16 Correct 3 ms 3840 KB Output is correct
17 Correct 3 ms 3712 KB Output is correct
18 Correct 3 ms 3712 KB Output is correct
19 Correct 3 ms 3712 KB Output is correct
20 Correct 3 ms 3712 KB Output is correct
21 Correct 3 ms 3712 KB Output is correct
22 Correct 3 ms 3712 KB Output is correct
23 Correct 7 ms 4480 KB Output is correct
24 Correct 7 ms 4480 KB Output is correct
25 Correct 7 ms 4480 KB Output is correct
26 Correct 7 ms 4480 KB Output is correct
27 Correct 7 ms 4480 KB Output is correct
28 Correct 7 ms 4480 KB Output is correct
29 Correct 7 ms 4480 KB Output is correct
30 Correct 7 ms 4480 KB Output is correct
31 Correct 7 ms 4480 KB Output is correct
32 Correct 7 ms 4480 KB Output is correct
33 Correct 9 ms 4480 KB Output is correct
34 Correct 7 ms 4480 KB Output is correct
35 Correct 7 ms 4480 KB Output is correct
36 Correct 7 ms 4608 KB Output is correct
37 Correct 7 ms 4480 KB Output is correct
38 Correct 10 ms 4480 KB Output is correct
39 Correct 7 ms 4480 KB Output is correct
40 Correct 9 ms 4456 KB Output is correct
41 Correct 7 ms 4480 KB Output is correct
42 Correct 7 ms 4480 KB Output is correct
43 Correct 8 ms 4480 KB Output is correct
44 Correct 9 ms 4480 KB Output is correct
45 Correct 1120 ms 89824 KB Output is correct
46 Correct 1062 ms 89056 KB Output is correct
47 Correct 1052 ms 87820 KB Output is correct
48 Correct 1025 ms 89948 KB Output is correct
49 Correct 1043 ms 87208 KB Output is correct
50 Correct 993 ms 87268 KB Output is correct
51 Correct 1020 ms 87396 KB Output is correct
52 Correct 1059 ms 89284 KB Output is correct
53 Correct 1051 ms 89180 KB Output is correct
54 Correct 1135 ms 89696 KB Output is correct
55 Correct 1091 ms 87648 KB Output is correct
56 Correct 1146 ms 86520 KB Output is correct
57 Correct 1086 ms 85712 KB Output is correct
58 Correct 940 ms 85344 KB Output is correct
59 Correct 990 ms 84960 KB Output is correct
60 Correct 582 ms 89544 KB Output is correct
61 Correct 1053 ms 88548 KB Output is correct
62 Correct 1092 ms 86880 KB Output is correct
63 Correct 1089 ms 87392 KB Output is correct
64 Correct 1033 ms 85728 KB Output is correct
65 Correct 1137 ms 87656 KB Output is correct
66 Correct 1083 ms 86580 KB Output is correct