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답안 #417585

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
417585 2021-06-04T01:58:17 Z ja_kingy Split the Attractions (IOI19_split) C++14
100 / 100
 284 ms 31164 KB 
#include "split.h"
#include <bits/stdc++.h>

using namespace std;
typedef pair<int,int> pii;
const int mxN = 1e5, INF = 1e9;
vector<int> adj[mxN], t[mxN], cg[mxN], ans;
int n, seen1[mxN], bst_mx=INF, bst_u, bst_v, dsu[mxN], sz[mxN];
int f(int x) {return dsu[x] != x ? dsu[x] = f(dsu[x]) : x;}

int dfs1(int u, int p) {
	seen1[u] = 1;
	int sm = 1, mx = 0, bv = 0;
	for (int v: adj[u]) {
		if (!seen1[v]) {
			t[u].push_back(v);
			t[v].push_back(u);
			int res = dfs1(v, u);
			sm += res;
			if (res > mx) {
				bv = v;
				mx = res;
			}
		}
	}
	int res = n-sm;
	if (res > mx) {
		bv = p;
		mx = res;
	}
	if (mx < bst_mx) {
		bst_mx = mx;
		bst_u = u;
		bst_v = bv;
	}
	return sm;
}

void dfs2(int u, pii &cc, vector<int>* g) {
	if (cc.first) {
		cc.first--;
		ans[u] = cc.second;
	} else return;
	for (int v: g[u]) if (!ans[v]) {
		dfs2(v, cc, g);
	}
}

void merge(int a, int b) {
	cg[a].push_back(b);
	cg[b].push_back(a);
	a = f(a), b = f(b);
	if (a != b) {
		if (sz[b] > sz[a]) swap(a,b);
		dsu[b] = a;
		sz[a] += sz[b];
	}
}

vector<int> find_split(int _n, int a, int b, int c, vector<int> p, vector<int> q) {
	n = _n;
	pii ccs[3] = {{a,1},{b,2},{c,3}};
	sort(ccs, ccs+3);
	ans.resize(n);
    for (int i  = 0; i < p.size(); ++i) {
		adj[p[i]].push_back(q[i]);
		adj[q[i]].push_back(p[i]);
	}
	dfs1(0,0);
	if (bst_mx >= ccs[0].first) {
		ans[bst_u] = ccs[1].second;
		dfs2(bst_v, ccs[0], t);
		dfs2(bst_u, ccs[1], t);
	} else {
		bool valid = 0;
		iota(dsu, dsu+n, 0);
		fill(sz, sz+n, 1);
		for (int u = 0; u < n; ++u) for (int v: t[u]) {
			if (u != bst_u && v != bst_u) merge(u, v);
		}
		for (int u = 0; u < n && !valid; ++u) for (int v: adj[u]) {
			if (u != bst_u && v != bst_u) merge(u, v);
			if (sz[f(u)] >= ccs[0].first) {
				valid = 1;
				dfs2(u, ccs[0], cg);
				dfs2(bst_u, ccs[1], t);
				break;
			}
		}
		if (!valid) return ans;
	}
	for (int i = 0; i < n; ++i) if (!ans[i]) ans[i] = ccs[2].second;
	return ans;
}

Compilation message

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:65:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for (int i  = 0; i < p.size(); ++i) {
      |                      ~~^~~~~~~~~~

Subtask #1
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7244 KB ok, correct split
2 Correct 4 ms 7344 KB ok, correct split
3 Correct 5 ms 7244 KB ok, correct split
4 Correct 4 ms 7352 KB ok, correct split
5 Correct 5 ms 7244 KB ok, correct split
6 Correct 4 ms 7244 KB ok, correct split
7 Correct 107 ms 26308 KB ok, correct split
8 Correct 106 ms 23628 KB ok, correct split
9 Correct 127 ms 22832 KB ok, correct split
10 Correct 98 ms 26816 KB ok, correct split
11 Correct 109 ms 26776 KB ok, correct split

Subtask #2
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7244 KB ok, correct split
2 Correct 4 ms 7344 KB ok, correct split
3 Correct 4 ms 7244 KB ok, correct split
4 Correct 116 ms 23352 KB ok, correct split
5 Correct 99 ms 17704 KB ok, correct split
6 Correct 113 ms 26932 KB ok, correct split
7 Correct 100 ms 23364 KB ok, correct split
8 Correct 130 ms 20488 KB ok, correct split
9 Correct 100 ms 17548 KB ok, correct split
10 Correct 74 ms 17836 KB ok, correct split
11 Correct 66 ms 17832 KB ok, correct split
12 Correct 71 ms 18168 KB ok, correct split

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7244 KB ok, correct split
2 Correct 89 ms 17716 KB ok, correct split
3 Correct 33 ms 11468 KB ok, correct split
4 Correct 6 ms 7244 KB ok, correct split
5 Correct 102 ms 20536 KB ok, correct split
6 Correct 97 ms 20276 KB ok, correct split
7 Correct 100 ms 20020 KB ok, correct split
8 Correct 103 ms 21700 KB ok, correct split
9 Correct 96 ms 19892 KB ok, correct split
10 Correct 48 ms 12992 KB ok, no valid answer
11 Correct 76 ms 15684 KB ok, no valid answer
12 Correct 118 ms 21156 KB ok, no valid answer
13 Correct 163 ms 23740 KB ok, no valid answer
14 Correct 75 ms 19064 KB ok, no valid answer

Subtask #4
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7244 KB ok, correct split
2 Correct 4 ms 7244 KB ok, no valid answer
3 Correct 4 ms 7244 KB ok, correct split
4 Correct 5 ms 7244 KB ok, correct split
5 Correct 5 ms 7244 KB ok, correct split
6 Correct 4 ms 7348 KB ok, correct split
7 Correct 4 ms 7244 KB ok, correct split
8 Correct 4 ms 7244 KB ok, correct split
9 Correct 7 ms 7628 KB ok, correct split
10 Correct 6 ms 7628 KB ok, correct split
11 Correct 4 ms 7372 KB ok, correct split
12 Correct 6 ms 7612 KB ok, correct split
13 Correct 4 ms 7340 KB ok, correct split
14 Correct 4 ms 7244 KB ok, correct split
15 Correct 4 ms 7244 KB ok, correct split
16 Correct 6 ms 7324 KB ok, correct split
17 Correct 5 ms 7324 KB ok, correct split
18 Correct 4 ms 7244 KB ok, correct split
19 Correct 5 ms 7372 KB ok, correct split
20 Correct 5 ms 7372 KB ok, correct split
21 Correct 6 ms 7636 KB ok, correct split
22 Correct 6 ms 7628 KB ok, correct split
23 Correct 6 ms 7628 KB ok, correct split
24 Correct 6 ms 7628 KB ok, correct split
25 Correct 6 ms 7628 KB ok, correct split
26 Correct 6 ms 7628 KB ok, correct split
27 Correct 6 ms 7628 KB ok, correct split
28 Correct 7 ms 7628 KB ok, correct split
29 Correct 5 ms 7348 KB ok, correct split
30 Correct 6 ms 7628 KB ok, correct split
31 Correct 5 ms 7372 KB ok, correct split
32 Correct 5 ms 7372 KB ok, correct split
33 Correct 5 ms 7344 KB ok, correct split
34 Correct 7 ms 7740 KB ok, correct split
35 Correct 7 ms 7628 KB ok, correct split
36 Correct 7 ms 7628 KB ok, correct split
37 Correct 7 ms 7756 KB ok, correct split
38 Correct 7 ms 7736 KB ok, correct split
39 Correct 7 ms 7752 KB ok, correct split
40 Correct 6 ms 7628 KB ok, correct split
41 Correct 5 ms 7500 KB ok, correct split
42 Correct 5 ms 7500 KB ok, correct split
43 Correct 7 ms 7740 KB ok, correct split
44 Correct 7 ms 7628 KB ok, correct split
45 Correct 7 ms 7740 KB ok, correct split
46 Correct 8 ms 7608 KB ok, correct split
47 Correct 7 ms 7756 KB ok, no valid answer
48 Correct 6 ms 7480 KB ok, correct split
49 Correct 6 ms 7612 KB ok, correct split
50 Correct 4 ms 7288 KB ok, no valid answer
51 Correct 5 ms 7332 KB ok, no valid answer
52 Correct 6 ms 7756 KB ok, no valid answer
53 Correct 8 ms 7868 KB ok, no valid answer
54 Correct 6 ms 7608 KB ok, no valid answer
55 Correct 7 ms 7696 KB ok, no valid answer
56 Correct 6 ms 7628 KB ok, no valid answer

Subtask #5
36.0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 7244 KB ok, correct split
2 Correct 4 ms 7344 KB ok, correct split
3 Correct 5 ms 7244 KB ok, correct split
4 Correct 4 ms 7352 KB ok, correct split
5 Correct 5 ms 7244 KB ok, correct split
6 Correct 4 ms 7244 KB ok, correct split
7 Correct 107 ms 26308 KB ok, correct split
8 Correct 106 ms 23628 KB ok, correct split
9 Correct 127 ms 22832 KB ok, correct split
10 Correct 98 ms 26816 KB ok, correct split
11 Correct 109 ms 26776 KB ok, correct split
12 Correct 4 ms 7244 KB ok, correct split
13 Correct 4 ms 7344 KB ok, correct split
14 Correct 4 ms 7244 KB ok, correct split
15 Correct 116 ms 23352 KB ok, correct split
16 Correct 99 ms 17704 KB ok, correct split
17 Correct 113 ms 26932 KB ok, correct split
18 Correct 100 ms 23364 KB ok, correct split
19 Correct 130 ms 20488 KB ok, correct split
20 Correct 100 ms 17548 KB ok, correct split
21 Correct 74 ms 17836 KB ok, correct split
22 Correct 66 ms 17832 KB ok, correct split
23 Correct 71 ms 18168 KB ok, correct split
24 Correct 4 ms 7244 KB ok, correct split
25 Correct 89 ms 17716 KB ok, correct split
26 Correct 33 ms 11468 KB ok, correct split
27 Correct 6 ms 7244 KB ok, correct split
28 Correct 102 ms 20536 KB ok, correct split
29 Correct 97 ms 20276 KB ok, correct split
30 Correct 100 ms 20020 KB ok, correct split
31 Correct 103 ms 21700 KB ok, correct split
32 Correct 96 ms 19892 KB ok, correct split
33 Correct 48 ms 12992 KB ok, no valid answer
34 Correct 76 ms 15684 KB ok, no valid answer
35 Correct 118 ms 21156 KB ok, no valid answer
36 Correct 163 ms 23740 KB ok, no valid answer
37 Correct 75 ms 19064 KB ok, no valid answer
38 Correct 5 ms 7244 KB ok, correct split
39 Correct 4 ms 7244 KB ok, no valid answer
40 Correct 4 ms 7244 KB ok, correct split
41 Correct 5 ms 7244 KB ok, correct split
42 Correct 5 ms 7244 KB ok, correct split
43 Correct 4 ms 7348 KB ok, correct split
44 Correct 4 ms 7244 KB ok, correct split
45 Correct 4 ms 7244 KB ok, correct split
46 Correct 7 ms 7628 KB ok, correct split
47 Correct 6 ms 7628 KB ok, correct split
48 Correct 4 ms 7372 KB ok, correct split
49 Correct 6 ms 7612 KB ok, correct split
50 Correct 4 ms 7340 KB ok, correct split
51 Correct 4 ms 7244 KB ok, correct split
52 Correct 4 ms 7244 KB ok, correct split
53 Correct 6 ms 7324 KB ok, correct split
54 Correct 5 ms 7324 KB ok, correct split
55 Correct 4 ms 7244 KB ok, correct split
56 Correct 5 ms 7372 KB ok, correct split
57 Correct 5 ms 7372 KB ok, correct split
58 Correct 6 ms 7636 KB ok, correct split
59 Correct 6 ms 7628 KB ok, correct split
60 Correct 6 ms 7628 KB ok, correct split
61 Correct 6 ms 7628 KB ok, correct split
62 Correct 6 ms 7628 KB ok, correct split
63 Correct 6 ms 7628 KB ok, correct split
64 Correct 6 ms 7628 KB ok, correct split
65 Correct 7 ms 7628 KB ok, correct split
66 Correct 5 ms 7348 KB ok, correct split
67 Correct 6 ms 7628 KB ok, correct split
68 Correct 5 ms 7372 KB ok, correct split
69 Correct 5 ms 7372 KB ok, correct split
70 Correct 5 ms 7344 KB ok, correct split
71 Correct 7 ms 7740 KB ok, correct split
72 Correct 7 ms 7628 KB ok, correct split
73 Correct 7 ms 7628 KB ok, correct split
74 Correct 7 ms 7756 KB ok, correct split
75 Correct 7 ms 7736 KB ok, correct split
76 Correct 7 ms 7752 KB ok, correct split
77 Correct 6 ms 7628 KB ok, correct split
78 Correct 5 ms 7500 KB ok, correct split
79 Correct 5 ms 7500 KB ok, correct split
80 Correct 7 ms 7740 KB ok, correct split
81 Correct 7 ms 7628 KB ok, correct split
82 Correct 7 ms 7740 KB ok, correct split
83 Correct 8 ms 7608 KB ok, correct split
84 Correct 7 ms 7756 KB ok, no valid answer
85 Correct 6 ms 7480 KB ok, correct split
86 Correct 6 ms 7612 KB ok, correct split
87 Correct 4 ms 7288 KB ok, no valid answer
88 Correct 5 ms 7332 KB ok, no valid answer
89 Correct 6 ms 7756 KB ok, no valid answer
90 Correct 8 ms 7868 KB ok, no valid answer
91 Correct 6 ms 7608 KB ok, no valid answer
92 Correct 7 ms 7696 KB ok, no valid answer
93 Correct 6 ms 7628 KB ok, no valid answer
94 Correct 116 ms 20932 KB ok, correct split
95 Correct 160 ms 26424 KB ok, correct split
96 Correct 166 ms 24644 KB ok, correct split
97 Correct 33 ms 11384 KB ok, correct split
98 Correct 35 ms 11536 KB ok, correct split
99 Correct 52 ms 13988 KB ok, correct split
100 Correct 193 ms 21168 KB ok, correct split
101 Correct 128 ms 20164 KB ok, correct split
102 Correct 126 ms 19788 KB ok, correct split
103 Correct 151 ms 19644 KB ok, correct split
104 Correct 104 ms 21376 KB ok, correct split
105 Correct 92 ms 17092 KB ok, correct split
106 Correct 152 ms 23352 KB ok, correct split
107 Correct 144 ms 23364 KB ok, correct split
108 Correct 179 ms 23348 KB ok, correct split
109 Correct 214 ms 27016 KB ok, correct split
110 Correct 179 ms 24528 KB ok, correct split
111 Correct 197 ms 24628 KB ok, correct split
112 Correct 165 ms 25552 KB ok, correct split
113 Correct 189 ms 25584 KB ok, correct split
114 Correct 16 ms 9036 KB ok, correct split
115 Correct 15 ms 8780 KB ok, correct split
116 Correct 159 ms 24508 KB ok, correct split
117 Correct 203 ms 24488 KB ok, correct split
118 Correct 91 ms 17604 KB ok, correct split
119 Correct 101 ms 17476 KB ok, correct split
120 Correct 112 ms 22468 KB ok, correct split
121 Correct 181 ms 24296 KB ok, no valid answer
122 Correct 167 ms 23276 KB ok, no valid answer
123 Correct 284 ms 31164 KB ok, no valid answer
124 Correct 278 ms 30656 KB ok, no valid answer
125 Correct 138 ms 21644 KB ok, no valid answer
126 Correct 73 ms 17864 KB ok, no valid answer
127 Correct 167 ms 23352 KB ok, no valid answer