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Submission #143804

# Submission time Handle Problem Language Result Execution time Memory
143804 2019-08-15T08:13:50 Z ainta Split the Attractions (IOI19_split) C++17
100 / 100
 256 ms 40256 KB 
#include "split.h"
#include <cstdio>
#include <algorithm>
#include <vector>
#define N_ 201000

using namespace std;

vector<int>E[N_], T[N_], GP[N_], G[N_];
int n, AA, BB, CC, par[N_], vis[N_], C[N_], Where[N_], chk[N_];
void DFS1(int a) {
	vis[a] = 1;
	C[a] = 1;
	for (auto &x : E[a]) {
		if (vis[x]) continue;
		par[x] = a;
		T[a].push_back(x);
		T[x].push_back(a);
		DFS1(x);
		C[a] += C[x];
	}
}


int M1=1, M2=2, M3=3;

vector<int>TP;
void DFS2(int a, int pp) {
	TP.push_back(a);
	for (auto &x : T[a]) {
		if (x == pp)continue;
		DFS2(x, a);
	}
}

void DFS3(int a, int pp, int ppp) {
	GP[ppp].push_back(a);
	Where[a] = ppp;
	C[a] = 1;
	for (auto &x : T[a]) {
		if (x != pp) {
			DFS3(x, a, ppp);
			C[a] += C[x];
		}
	}
}

int val[N_], szlim;

void DFS4(int a){
	vis[a] = 1;
	if (szlim) {
		TP.push_back(a);
		szlim--;
	}
	for (auto &x : E[a]) {
		if (val[x] && !vis[x])DFS4(x);
	}
}

vector<int>Conn(vector<int> A, int num) {
	int i;
	for (i = 1; i <= n; i++)val[i] = 0, vis[i] = 0;
	for (auto &x : A)val[x] = 1;
	TP.clear();
	szlim = num;
	DFS4(A[0]);
	return TP;
}

vector<int> Remaining(vector<int> A) {
	int i;
	for (i = 1; i <= n; i++)vis[i] = 0;
	for (auto &x : A)vis[x] = 1;
	vector<int>res;
	for (i = 1; i <= n; i++)if (!vis[i])res.push_back(i);
	return res;
}

vector<int>MakeAns(vector<int>A, vector<int>B) {
	if (A.size() > B.size()) {
		swap(A, B);
	}
	A = Conn(A, AA);
	B = Conn(B, BB);
	vector<int>res(n);
	for (int i = 0; i < n; i++)res[i] = M3;
	for (auto &x : A)res[x-1] = M1;
	for (auto &x : B)res[x-1] = M2;
	return res;
}

int sum;
void Go(int a) {
	vis[a] = 1;
	TP.push_back(a);
	sum += C[a];
	if (sum >= AA)return;
	for (auto &x : G[a]) {
		if (!vis[x]) {
			Go(x);
			if (sum >= AA)return;
		}
	}
}

vector<int> find_split(int N, int a, int b, int c, vector<int> p, vector<int> q) {
	n = N;
	if (a > b)swap(a, b),swap(M1,M2);
	if (a > c)swap(a, c),swap(M1,M3);
	if (b > c)swap(b, c),swap(M2,M3);
	AA = a, BB = b, CC = c;
	int i;
	for (i = 0; i < p.size(); i++) {
		E[p[i]+1].push_back(q[i]+1);
		E[q[i]+1].push_back(p[i]+1);
	}
	DFS1(1);

	for (i = 1; i <= n; i++) {
		if ((C[i] >= AA && n - C[i] >= BB)|| (C[i] >= BB && n - C[i] >= AA)) {
			TP.clear();
			DFS2(i, par[i]);
			vector<int>TP2 = Remaining(TP);
			return MakeAns(TP, TP2);
		}
	}

	int Mn = 1e9, mid = -1;
	for (i = 1; i <= n; i++) {
		if (Mn > C[i] && C[i] * 2 > n)Mn = C[i], mid = i;
	}
	for (auto &x : T[mid]) {
		chk[x] = 1;
		DFS3(x, mid, x);
	}

	for (i = 1; i <= n; i++) {
		for (auto &x : E[i]) {
			if (i == mid || x == mid)continue;
			if (Where[i] != Where[x]) {
				G[Where[i]].push_back(Where[x]);
			}
		}
	}

	for (i = 1; i <= n; i++)vis[i] = 0;
	for (auto &t : T[mid]) {
		sum = 0;
		TP.clear();
		Go(T[mid][0]);
		if (sum >= AA) {

			vector<int>TT;
			for (auto &tt : TP) {
				for (auto &x : GP[tt]) {
					TT.push_back(x);
				}
			}
			return MakeAns(TT, Remaining(TT));
		}
	}
	vector<int>res(n);
	return res;
}

Compilation message

split.cpp: In function 'std::vector<int> find_split(int, int, int, int, std::vector<int>, std::vector<int>)':
split.cpp:114:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < p.size(); i++) {
              ~~^~~~~~~~~~
split.cpp:148:13: warning: unused variable 't' [-Wunused-variable]
  for (auto &t : T[mid]) {
             ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 19192 KB ok, correct split
2 Correct 19 ms 19192 KB ok, correct split
3 Correct 19 ms 19192 KB ok, correct split
4 Correct 19 ms 19192 KB ok, correct split
5 Correct 20 ms 19064 KB ok, correct split
6 Correct 62 ms 19192 KB ok, correct split
7 Correct 182 ms 34424 KB ok, correct split
8 Correct 168 ms 33120 KB ok, correct split
9 Correct 167 ms 32892 KB ok, correct split
10 Correct 173 ms 34620 KB ok, correct split
11 Correct 177 ms 34580 KB ok, correct split

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 19192 KB ok, correct split
2 Correct 23 ms 19192 KB ok, correct split
3 Correct 23 ms 19192 KB ok, correct split
4 Correct 195 ms 33136 KB ok, correct split
5 Correct 143 ms 30388 KB ok, correct split
6 Correct 169 ms 34672 KB ok, correct split
7 Correct 177 ms 32984 KB ok, correct split
8 Correct 187 ms 32116 KB ok, correct split
9 Correct 159 ms 30404 KB ok, correct split
10 Correct 118 ms 31088 KB ok, correct split
11 Correct 117 ms 30732 KB ok, correct split
12 Correct 110 ms 31048 KB ok, correct split

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 19192 KB ok, correct split
2 Correct 149 ms 30236 KB ok, correct split
3 Correct 71 ms 23672 KB ok, correct split
4 Correct 19 ms 19192 KB ok, correct split
5 Correct 170 ms 31600 KB ok, correct split
6 Correct 173 ms 31472 KB ok, correct split
7 Correct 178 ms 31464 KB ok, correct split
8 Correct 168 ms 32112 KB ok, correct split
9 Correct 178 ms 31344 KB ok, correct split
10 Correct 63 ms 23032 KB ok, no valid answer
11 Correct 71 ms 24696 KB ok, no valid answer
12 Correct 137 ms 32116 KB ok, no valid answer
13 Correct 149 ms 30428 KB ok, no valid answer
14 Correct 131 ms 33236 KB ok, no valid answer

Subtask #4
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 19164 KB ok, correct split
2 Correct 23 ms 19252 KB ok, no valid answer
3 Correct 20 ms 19196 KB ok, correct split
4 Correct 29 ms 19192 KB ok, correct split
5 Correct 20 ms 19192 KB ok, correct split
6 Correct 19 ms 19192 KB ok, correct split
7 Correct 19 ms 19192 KB ok, correct split
8 Correct 19 ms 19192 KB ok, correct split
9 Correct 22 ms 19576 KB ok, correct split
10 Correct 23 ms 19576 KB ok, correct split
11 Correct 19 ms 19192 KB ok, correct split
12 Correct 22 ms 19576 KB ok, correct split
13 Correct 19 ms 19192 KB ok, correct split
14 Correct 19 ms 19192 KB ok, correct split
15 Correct 19 ms 19192 KB ok, correct split
16 Correct 19 ms 19192 KB ok, correct split
17 Correct 19 ms 19192 KB ok, correct split
18 Correct 20 ms 19192 KB ok, correct split
19 Correct 20 ms 19320 KB ok, correct split
20 Correct 21 ms 19320 KB ok, correct split
21 Correct 22 ms 19576 KB ok, correct split
22 Correct 22 ms 19448 KB ok, correct split
23 Correct 21 ms 19576 KB ok, correct split
24 Correct 22 ms 19576 KB ok, correct split
25 Correct 22 ms 19576 KB ok, correct split
26 Correct 21 ms 19704 KB ok, correct split
27 Correct 28 ms 19704 KB ok, correct split
28 Correct 22 ms 19676 KB ok, correct split
29 Correct 19 ms 19292 KB ok, correct split
30 Correct 25 ms 19576 KB ok, correct split
31 Correct 20 ms 19320 KB ok, correct split
32 Correct 20 ms 19320 KB ok, correct split
33 Correct 19 ms 19292 KB ok, correct split
34 Correct 22 ms 19576 KB ok, correct split
35 Correct 22 ms 19576 KB ok, correct split
36 Correct 21 ms 19576 KB ok, correct split
37 Correct 23 ms 19580 KB ok, correct split
38 Correct 23 ms 19576 KB ok, correct split
39 Correct 22 ms 19580 KB ok, correct split
40 Correct 22 ms 19576 KB ok, correct split
41 Correct 25 ms 19324 KB ok, correct split
42 Correct 25 ms 19320 KB ok, correct split
43 Correct 28 ms 19576 KB ok, correct split
44 Correct 26 ms 19576 KB ok, correct split
45 Correct 26 ms 19576 KB ok, correct split
46 Correct 25 ms 19448 KB ok, correct split
47 Correct 26 ms 19576 KB ok, no valid answer
48 Correct 22 ms 19576 KB ok, correct split
49 Correct 21 ms 19576 KB ok, correct split
50 Correct 19 ms 19192 KB ok, no valid answer
51 Correct 19 ms 19192 KB ok, no valid answer
52 Correct 21 ms 19448 KB ok, no valid answer
53 Correct 26 ms 19576 KB ok, no valid answer
54 Correct 27 ms 19576 KB ok, no valid answer
55 Correct 27 ms 19576 KB ok, no valid answer
56 Correct 24 ms 19576 KB ok, no valid answer

Subtask #5
36.0 / 36.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 19192 KB ok, correct split
2 Correct 19 ms 19192 KB ok, correct split
3 Correct 19 ms 19192 KB ok, correct split
4 Correct 19 ms 19192 KB ok, correct split
5 Correct 20 ms 19064 KB ok, correct split
6 Correct 62 ms 19192 KB ok, correct split
7 Correct 182 ms 34424 KB ok, correct split
8 Correct 168 ms 33120 KB ok, correct split
9 Correct 167 ms 32892 KB ok, correct split
10 Correct 173 ms 34620 KB ok, correct split
11 Correct 177 ms 34580 KB ok, correct split
12 Correct 23 ms 19192 KB ok, correct split
13 Correct 23 ms 19192 KB ok, correct split
14 Correct 23 ms 19192 KB ok, correct split
15 Correct 195 ms 33136 KB ok, correct split
16 Correct 143 ms 30388 KB ok, correct split
17 Correct 169 ms 34672 KB ok, correct split
18 Correct 177 ms 32984 KB ok, correct split
19 Correct 187 ms 32116 KB ok, correct split
20 Correct 159 ms 30404 KB ok, correct split
21 Correct 118 ms 31088 KB ok, correct split
22 Correct 117 ms 30732 KB ok, correct split
23 Correct 110 ms 31048 KB ok, correct split
24 Correct 18 ms 19192 KB ok, correct split
25 Correct 149 ms 30236 KB ok, correct split
26 Correct 71 ms 23672 KB ok, correct split
27 Correct 19 ms 19192 KB ok, correct split
28 Correct 170 ms 31600 KB ok, correct split
29 Correct 173 ms 31472 KB ok, correct split
30 Correct 178 ms 31464 KB ok, correct split
31 Correct 168 ms 32112 KB ok, correct split
32 Correct 178 ms 31344 KB ok, correct split
33 Correct 63 ms 23032 KB ok, no valid answer
34 Correct 71 ms 24696 KB ok, no valid answer
35 Correct 137 ms 32116 KB ok, no valid answer
36 Correct 149 ms 30428 KB ok, no valid answer
37 Correct 131 ms 33236 KB ok, no valid answer
38 Correct 24 ms 19164 KB ok, correct split
39 Correct 23 ms 19252 KB ok, no valid answer
40 Correct 20 ms 19196 KB ok, correct split
41 Correct 29 ms 19192 KB ok, correct split
42 Correct 20 ms 19192 KB ok, correct split
43 Correct 19 ms 19192 KB ok, correct split
44 Correct 19 ms 19192 KB ok, correct split
45 Correct 19 ms 19192 KB ok, correct split
46 Correct 22 ms 19576 KB ok, correct split
47 Correct 23 ms 19576 KB ok, correct split
48 Correct 19 ms 19192 KB ok, correct split
49 Correct 22 ms 19576 KB ok, correct split
50 Correct 19 ms 19192 KB ok, correct split
51 Correct 19 ms 19192 KB ok, correct split
52 Correct 19 ms 19192 KB ok, correct split
53 Correct 19 ms 19192 KB ok, correct split
54 Correct 19 ms 19192 KB ok, correct split
55 Correct 20 ms 19192 KB ok, correct split
56 Correct 20 ms 19320 KB ok, correct split
57 Correct 21 ms 19320 KB ok, correct split
58 Correct 22 ms 19576 KB ok, correct split
59 Correct 22 ms 19448 KB ok, correct split
60 Correct 21 ms 19576 KB ok, correct split
61 Correct 22 ms 19576 KB ok, correct split
62 Correct 22 ms 19576 KB ok, correct split
63 Correct 21 ms 19704 KB ok, correct split
64 Correct 28 ms 19704 KB ok, correct split
65 Correct 22 ms 19676 KB ok, correct split
66 Correct 19 ms 19292 KB ok, correct split
67 Correct 25 ms 19576 KB ok, correct split
68 Correct 20 ms 19320 KB ok, correct split
69 Correct 20 ms 19320 KB ok, correct split
70 Correct 19 ms 19292 KB ok, correct split
71 Correct 22 ms 19576 KB ok, correct split
72 Correct 22 ms 19576 KB ok, correct split
73 Correct 21 ms 19576 KB ok, correct split
74 Correct 23 ms 19580 KB ok, correct split
75 Correct 23 ms 19576 KB ok, correct split
76 Correct 22 ms 19580 KB ok, correct split
77 Correct 22 ms 19576 KB ok, correct split
78 Correct 25 ms 19324 KB ok, correct split
79 Correct 25 ms 19320 KB ok, correct split
80 Correct 28 ms 19576 KB ok, correct split
81 Correct 26 ms 19576 KB ok, correct split
82 Correct 26 ms 19576 KB ok, correct split
83 Correct 25 ms 19448 KB ok, correct split
84 Correct 26 ms 19576 KB ok, no valid answer
85 Correct 22 ms 19576 KB ok, correct split
86 Correct 21 ms 19576 KB ok, correct split
87 Correct 19 ms 19192 KB ok, no valid answer
88 Correct 19 ms 19192 KB ok, no valid answer
89 Correct 21 ms 19448 KB ok, no valid answer
90 Correct 26 ms 19576 KB ok, no valid answer
91 Correct 27 ms 19576 KB ok, no valid answer
92 Correct 27 ms 19576 KB ok, no valid answer
93 Correct 24 ms 19576 KB ok, no valid answer
94 Correct 173 ms 31848 KB ok, correct split
95 Correct 228 ms 34996 KB ok, correct split
96 Correct 193 ms 33896 KB ok, correct split
97 Correct 63 ms 23800 KB ok, correct split
98 Correct 78 ms 23672 KB ok, correct split
99 Correct 88 ms 24952 KB ok, correct split
100 Correct 199 ms 32496 KB ok, correct split
101 Correct 198 ms 31856 KB ok, correct split
102 Correct 182 ms 31952 KB ok, correct split
103 Correct 168 ms 31444 KB ok, correct split
104 Correct 164 ms 32736 KB ok, correct split
105 Correct 100 ms 27092 KB ok, correct split
106 Correct 215 ms 40256 KB ok, correct split
107 Correct 159 ms 31568 KB ok, correct split
108 Correct 162 ms 31292 KB ok, correct split
109 Correct 231 ms 33384 KB ok, correct split
110 Correct 228 ms 34360 KB ok, correct split
111 Correct 226 ms 34048 KB ok, correct split
112 Correct 220 ms 34732 KB ok, correct split
113 Correct 212 ms 34368 KB ok, correct split
114 Correct 34 ms 20856 KB ok, correct split
115 Correct 33 ms 20600 KB ok, correct split
116 Correct 248 ms 33880 KB ok, correct split
117 Correct 256 ms 33288 KB ok, correct split
118 Correct 169 ms 29932 KB ok, correct split
119 Correct 235 ms 30344 KB ok, correct split
120 Correct 182 ms 32504 KB ok, correct split
121 Correct 208 ms 30072 KB ok, no valid answer
122 Correct 154 ms 30704 KB ok, no valid answer
123 Correct 204 ms 32088 KB ok, no valid answer
124 Correct 209 ms 32376 KB ok, no valid answer
125 Correct 157 ms 32752 KB ok, no valid answer
126 Correct 115 ms 31904 KB ok, no valid answer
127 Correct 248 ms 32356 KB ok, no valid answer