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답안 #446366

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
446366 2021-07-21T16:50:40 Z ics0503 별자리 3 (JOI20_constellation3) C++17
100 / 100
 1182 ms 411796 KB 
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#include<time.h>
#include<stdio.h>
#include<vector>
#include<algorithm>
#include<set>
using namespace std; 
int a[212121];
struct xy {
	int t,x,y,c;
}all[414141]; int an;
bool sort_y(xy a, xy b) {
	if (a.y != b.y)return a.y > b.y;
	if (a.t != b.t)return a.t < b.t;
	return a.x < b.x;
}
set<pair<int, int>>S; int tn;
vector<int>edge[414141];
vector<pair<int, int>>qr[414141];
int S_start[414141], S_end[414141];
vector<int>S_ER[414141]; int point[414141];
void insert_S(int s, int e,int parent) {
	tn++;
	S.insert({ -s,tn });
	S_start[tn] = s; S_end[tn] = e;
	if (parent) edge[parent].push_back(tn);
}
int pp[414141][20];
long long sparse[414141][20];;
vector<int>need_to_fill[414141][18];
void init_sparse(int w, int bef) {
	pp[w][0] = bef;
	for (int i = 0; pp[w][i] != -1; i++) {
		need_to_fill[pp[w][i]][i].push_back(w);
		pp[w][i + 1] = pp[pp[w][i]][i];
	}
	for (int nxt : edge[w]) init_sparse(nxt, w);
}
long long D[414141], depth[414141], CS[414141];
void dfs(int w,int bef,int dep) {
	long long sum = 0;
	depth[w] = dep; 
	for (int nxt : edge[w]) {
		dfs(nxt, w, dep + 1);
		sum += D[nxt];
	}
	CS[w] = sum;
	for (int nxt : edge[w]) {
		long long v = sum - D[nxt];
		sparse[nxt][0] = v;
		for (int i = 1; i < 18; i++) {
			for (int who : need_to_fill[nxt][i]) {
				int p = pp[who][i - 1];
				sparse[who][i] = sparse[p][i - 1] + sparse[who][i - 1];
			}
		}
	}
	long long qmax = 0;
	for (auto q : qr[w]) {
		long long res = q.second;
		int now = point[q.first];
		res += CS[now];
		for (int i = 18; i >= 0; i--) {
			int nxt = pp[now][i];
			if (nxt == -1 || depth[nxt] <= depth[w])continue;
			res += sparse[now][i];
			now = nxt;
		}
		if(now!=w)res += sparse[now][0];
		qmax = max(qmax, res);
	}
	D[w] = max(sum, qmax);
}
int ck[414141];
vector<int>erL;
int main() {
	int n; scanf("%d", &n);
	int i, j;
	for (i = 1; i <= n; i++) {
		scanf("%d", &a[i]);
		all[an++] = { 1,i,a[i],0 };
	}
	int m; scanf("%d", &m);
	long long allS = 0;
	for (i = 1; i <= m; i++) {
		all[an].t = 2;
		scanf("%d%d%d", &all[an].x, &all[an].y, &all[an].c);
		allS += all[an].c;
		an++;
	}
	sort(all, all + an, sort_y);
	int st, en;
	insert_S(1, n, 0);
	int e9 = 1e9;
	for (st = 0; st < an; st = en) {
		for (en = st; all[st].y == all[en].y; en++);
		// [st, en)
		for (i = st; i < en; i++) {
			int t = all[i].t, x = all[i].x, y = all[i].y, c = all[i].c;
			if (t != 1) continue;			
			auto v = S.lower_bound({ -x,-e9 });
			int who = v->second;
			S_ER[who].push_back(x);
			if(ck[who]==0) erL.push_back(who);
			ck[who] = 1;
		}
		for (auto who : erL) {
			int s = S_start[who], e = S_end[who];
			for (i = 0; i < S_ER[who].size(); i++) {
				int x = S_ER[who][i];
				point[x] = who;
				int new_st = s, new_en = x - 1;
				if (new_st <= new_en) insert_S(new_st, new_en, who);
				s = x + 1;
				if (i + 1 == S_ER[who].size()) {
					if (s <= e) insert_S(s, e, who);
				}
			}
			ck[who] = 0;
			S.erase({ -S_start[who], who });
		}
		erL.clear();
		for (i = st; i < en; i++) {
			int t = all[i].t, x = all[i].x, y = all[i].y, c = all[i].c;
			if (t != 2) continue;
			auto v = S.lower_bound({ -x,-e9 });
			if (v == S.end())continue;
			int who = v->second;
			if(S_start[who] <= x && x <= S_end[who]) qr[who].push_back({ x, c });
		}
	}
	for (i = 1; i <= tn; i++)for (j = 0; j < 20; j++)pp[i][j] = -1;
	init_sparse(1, -1);
	dfs(1, -1, 0);
	printf("%lld\n", allS - D[1]);
	return 0;
}

Compilation message

constellation3.cpp: In function 'int main()':
constellation3.cpp:101:36: warning: unused variable 'y' [-Wunused-variable]
  101 |    int t = all[i].t, x = all[i].x, y = all[i].y, c = all[i].c;
      |                                    ^
constellation3.cpp:101:50: warning: unused variable 'c' [-Wunused-variable]
  101 |    int t = all[i].t, x = all[i].x, y = all[i].y, c = all[i].c;
      |                                                  ^
constellation3.cpp:111:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  111 |    for (i = 0; i < S_ER[who].size(); i++) {
      |                ~~^~~~~~~~~~~~~~~~~~
constellation3.cpp:117:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  117 |     if (i + 1 == S_ER[who].size()) {
      |         ~~~~~~^~~~~~~~~~~~~~~~~~~
constellation3.cpp:126:36: warning: unused variable 'y' [-Wunused-variable]
  126 |    int t = all[i].t, x = all[i].x, y = all[i].y, c = all[i].c;
      |                                    ^
constellation3.cpp:79:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |  int n; scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
constellation3.cpp:82:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   82 |   scanf("%d", &a[i]);
      |   ~~~~~^~~~~~~~~~~~~
constellation3.cpp:85:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   85 |  int m; scanf("%d", &m);
      |         ~~~~~^~~~~~~~~~
constellation3.cpp:89:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   89 |   scanf("%d%d%d", &all[an].x, &all[an].y, &all[an].c);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 143 ms 204696 KB Output is correct
2 Correct 142 ms 204612 KB Output is correct
3 Correct 141 ms 204744 KB Output is correct
4 Correct 142 ms 204672 KB Output is correct
5 Correct 139 ms 204680 KB Output is correct
6 Correct 142 ms 204588 KB Output is correct
7 Correct 140 ms 204716 KB Output is correct
8 Correct 140 ms 204816 KB Output is correct
9 Correct 142 ms 204632 KB Output is correct
10 Correct 145 ms 204684 KB Output is correct
11 Correct 142 ms 204732 KB Output is correct
12 Correct 140 ms 204708 KB Output is correct
13 Correct 143 ms 204608 KB Output is correct
14 Correct 142 ms 204620 KB Output is correct
15 Correct 139 ms 204612 KB Output is correct
16 Correct 140 ms 204740 KB Output is correct
17 Correct 142 ms 204584 KB Output is correct
18 Correct 145 ms 204724 KB Output is correct
19 Correct 146 ms 204612 KB Output is correct
20 Correct 137 ms 204664 KB Output is correct
21 Correct 139 ms 204692 KB Output is correct
22 Correct 142 ms 204612 KB Output is correct

Subtask #2
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 143 ms 204696 KB Output is correct
2 Correct 142 ms 204612 KB Output is correct
3 Correct 141 ms 204744 KB Output is correct
4 Correct 142 ms 204672 KB Output is correct
5 Correct 139 ms 204680 KB Output is correct
6 Correct 142 ms 204588 KB Output is correct
7 Correct 140 ms 204716 KB Output is correct
8 Correct 140 ms 204816 KB Output is correct
9 Correct 142 ms 204632 KB Output is correct
10 Correct 145 ms 204684 KB Output is correct
11 Correct 142 ms 204732 KB Output is correct
12 Correct 140 ms 204708 KB Output is correct
13 Correct 143 ms 204608 KB Output is correct
14 Correct 142 ms 204620 KB Output is correct
15 Correct 139 ms 204612 KB Output is correct
16 Correct 140 ms 204740 KB Output is correct
17 Correct 142 ms 204584 KB Output is correct
18 Correct 145 ms 204724 KB Output is correct
19 Correct 146 ms 204612 KB Output is correct
20 Correct 137 ms 204664 KB Output is correct
21 Correct 139 ms 204692 KB Output is correct
22 Correct 142 ms 204612 KB Output is correct
23 Correct 143 ms 205352 KB Output is correct
24 Correct 153 ms 205296 KB Output is correct
25 Correct 150 ms 205380 KB Output is correct
26 Correct 150 ms 205436 KB Output is correct
27 Correct 142 ms 205324 KB Output is correct
28 Correct 145 ms 205296 KB Output is correct
29 Correct 141 ms 205404 KB Output is correct
30 Correct 145 ms 205508 KB Output is correct
31 Correct 149 ms 205304 KB Output is correct
32 Correct 149 ms 205820 KB Output is correct
33 Correct 147 ms 205636 KB Output is correct
34 Correct 145 ms 205536 KB Output is correct
35 Correct 155 ms 205528 KB Output is correct
36 Correct 141 ms 204660 KB Output is correct
37 Correct 144 ms 204732 KB Output is correct
38 Correct 149 ms 206152 KB Output is correct
39 Correct 144 ms 205128 KB Output is correct
40 Correct 147 ms 205668 KB Output is correct
41 Correct 142 ms 204996 KB Output is correct
42 Correct 143 ms 205180 KB Output is correct
43 Correct 147 ms 205636 KB Output is correct
44 Correct 146 ms 204952 KB Output is correct

Subtask #3
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 143 ms 204696 KB Output is correct
2 Correct 142 ms 204612 KB Output is correct
3 Correct 141 ms 204744 KB Output is correct
4 Correct 142 ms 204672 KB Output is correct
5 Correct 139 ms 204680 KB Output is correct
6 Correct 142 ms 204588 KB Output is correct
7 Correct 140 ms 204716 KB Output is correct
8 Correct 140 ms 204816 KB Output is correct
9 Correct 142 ms 204632 KB Output is correct
10 Correct 145 ms 204684 KB Output is correct
11 Correct 142 ms 204732 KB Output is correct
12 Correct 140 ms 204708 KB Output is correct
13 Correct 143 ms 204608 KB Output is correct
14 Correct 142 ms 204620 KB Output is correct
15 Correct 139 ms 204612 KB Output is correct
16 Correct 140 ms 204740 KB Output is correct
17 Correct 142 ms 204584 KB Output is correct
18 Correct 145 ms 204724 KB Output is correct
19 Correct 146 ms 204612 KB Output is correct
20 Correct 137 ms 204664 KB Output is correct
21 Correct 139 ms 204692 KB Output is correct
22 Correct 142 ms 204612 KB Output is correct
23 Correct 143 ms 205352 KB Output is correct
24 Correct 153 ms 205296 KB Output is correct
25 Correct 150 ms 205380 KB Output is correct
26 Correct 150 ms 205436 KB Output is correct
27 Correct 142 ms 205324 KB Output is correct
28 Correct 145 ms 205296 KB Output is correct
29 Correct 141 ms 205404 KB Output is correct
30 Correct 145 ms 205508 KB Output is correct
31 Correct 149 ms 205304 KB Output is correct
32 Correct 149 ms 205820 KB Output is correct
33 Correct 147 ms 205636 KB Output is correct
34 Correct 145 ms 205536 KB Output is correct
35 Correct 155 ms 205528 KB Output is correct
36 Correct 141 ms 204660 KB Output is correct
37 Correct 144 ms 204732 KB Output is correct
38 Correct 149 ms 206152 KB Output is correct
39 Correct 144 ms 205128 KB Output is correct
40 Correct 147 ms 205668 KB Output is correct
41 Correct 142 ms 204996 KB Output is correct
42 Correct 143 ms 205180 KB Output is correct
43 Correct 147 ms 205636 KB Output is correct
44 Correct 146 ms 204952 KB Output is correct
45 Correct 999 ms 291992 KB Output is correct
46 Correct 973 ms 290904 KB Output is correct
47 Correct 1027 ms 289680 KB Output is correct
48 Correct 988 ms 292272 KB Output is correct
49 Correct 961 ms 289100 KB Output is correct
50 Correct 982 ms 289408 KB Output is correct
51 Correct 959 ms 289400 KB Output is correct
52 Correct 970 ms 291252 KB Output is correct
53 Correct 969 ms 291220 KB Output is correct
54 Correct 1119 ms 362948 KB Output is correct
55 Correct 1028 ms 338116 KB Output is correct
56 Correct 980 ms 325936 KB Output is correct
57 Correct 940 ms 317436 KB Output is correct
58 Correct 321 ms 216900 KB Output is correct
59 Correct 325 ms 216712 KB Output is correct
60 Correct 1182 ms 411796 KB Output is correct
61 Correct 513 ms 266728 KB Output is correct
62 Correct 1000 ms 347384 KB Output is correct
63 Correct 446 ms 253596 KB Output is correct
64 Correct 490 ms 264392 KB Output is correct
65 Correct 1004 ms 349228 KB Output is correct
66 Correct 438 ms 253024 KB Output is correct