oj.uz

Submission #375500

# Submission time Handle Problem Language Result Execution time Memory
375500 2021-03-09T13:17:18 Z LucaDantas Tropical Garden (IOI11_garden) C++17
100 / 100
 125 ms 32364 KB 
#include "garden.h"
#include "gardenlib.h"
#include<vector>
#include<cstdio>
#include<cstring>

constexpr int maxn = 3e5+10;

std::vector<int> g[maxn]; // functional graph reversed
int f[maxn], s[maxn], dist[maxn][2], ans[maxn][2], last[maxn][2], n, sz[2];
bool mark[maxn];

void dfs(int u, int d, int k, int p) {
	if(u < n/2) ++dist[d][k];
	for(int v : g[u])
		if(v != p) dfs(v, d+1, k, p);
}

void dfs2(int u, int k, int p) {
	mark[u] = 1; ++sz[k];
	if(f[u] == p) return;
	if(mark[f[u]]) return (void)(sz[k] = maxn);
	dfs2(f[u], k, p);
}

void count_routes(int N, int M, int P, int R[][2], int Q, int G[]) {
	n = 2*N;
	for(int i = 0; i < n; i++)
		f[i] = s[i] = -1;
	for(int i = 0; i < M; i++) {
		int a = R[i][0], b = R[i][1];
		
		if(f[a] == -1) f[a] = b;
		else if(s[a] == -1) s[a] = b;

		if(f[b] == -1) f[b] = a;
		else if(s[b] == -1) s[b] = a;
	}
	
	for(int a = 0; a < N; a++) {
		if(s[a] == -1) s[a] = f[a];
		if(f[f[a]] == a) g[f[a]+N].push_back(a);
		else g[f[a]].push_back(a);
		if(f[s[a]] == a) g[s[a]+N].push_back(a+N);
		else g[s[a]].push_back(a+N);
	}

	for(int i = 0; i < n; i++)
		for(int v : g[i]) f[v] = i;
	
	dfs(P, 0, 0, P);

	dfs(P+N, 0, 1, P+N);

	dfs2(P, 0, P);
	memset(mark, 0, sizeof mark);
	dfs2(P+N, 1, P+N);

	for(int b = 0; b <= 1; b++) {
		for(int i = 0; i < n; i++) {
			ans[i][b] = (i>=sz[b]?ans[i-sz[b]][b]:0) + dist[i][b];
			last[i%sz[b]][b] = i;
		}
	}
	for(int i = 0; i < Q; i++) {
		int here = 0;
		for(int b = 0; b <= 1; b++)
			if(sz[b] < maxn) here += ans[std::min(G[i], last[G[i]%sz[b]][b])][b];
			else if(G[i] < n) here += dist[G[i]][b];
		answer(here);
	}
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7788 KB Output is correct
2 Correct 6 ms 7788 KB Output is correct
3 Correct 6 ms 7788 KB Output is correct
4 Correct 6 ms 7660 KB Output is correct
5 Correct 5 ms 7660 KB Output is correct
6 Correct 8 ms 7916 KB Output is correct
7 Correct 6 ms 7660 KB Output is correct
8 Correct 6 ms 7788 KB Output is correct
9 Correct 7 ms 7788 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7788 KB Output is correct
2 Correct 6 ms 7788 KB Output is correct
3 Correct 6 ms 7788 KB Output is correct
4 Correct 6 ms 7660 KB Output is correct
5 Correct 5 ms 7660 KB Output is correct
6 Correct 8 ms 7916 KB Output is correct
7 Correct 6 ms 7660 KB Output is correct
8 Correct 6 ms 7788 KB Output is correct
9 Correct 7 ms 7788 KB Output is correct
10 Correct 6 ms 7660 KB Output is correct
11 Correct 14 ms 9580 KB Output is correct
12 Correct 28 ms 10604 KB Output is correct
13 Correct 53 ms 26348 KB Output is correct
14 Correct 91 ms 17516 KB Output is correct
15 Correct 125 ms 17772 KB Output is correct
16 Correct 83 ms 15212 KB Output is correct
17 Correct 74 ms 15212 KB Output is correct
18 Correct 27 ms 11264 KB Output is correct
19 Correct 97 ms 17688 KB Output is correct
20 Correct 118 ms 17900 KB Output is correct
21 Correct 91 ms 16504 KB Output is correct
22 Correct 88 ms 14060 KB Output is correct
23 Correct 101 ms 18540 KB Output is correct

Subtask #3
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 7788 KB Output is correct
2 Correct 6 ms 7788 KB Output is correct
3 Correct 6 ms 7788 KB Output is correct
4 Correct 6 ms 7660 KB Output is correct
5 Correct 5 ms 7660 KB Output is correct
6 Correct 8 ms 7916 KB Output is correct
7 Correct 6 ms 7660 KB Output is correct
8 Correct 6 ms 7788 KB Output is correct
9 Correct 7 ms 7788 KB Output is correct
10 Correct 6 ms 7660 KB Output is correct
11 Correct 14 ms 9580 KB Output is correct
12 Correct 28 ms 10604 KB Output is correct
13 Correct 53 ms 26348 KB Output is correct
14 Correct 91 ms 17516 KB Output is correct
15 Correct 125 ms 17772 KB Output is correct
16 Correct 83 ms 15212 KB Output is correct
17 Correct 74 ms 15212 KB Output is correct
18 Correct 27 ms 11264 KB Output is correct
19 Correct 97 ms 17688 KB Output is correct
20 Correct 118 ms 17900 KB Output is correct
21 Correct 91 ms 16504 KB Output is correct
22 Correct 88 ms 14060 KB Output is correct
23 Correct 101 ms 18540 KB Output is correct
24 Correct 7 ms 7804 KB Output is correct
25 Correct 15 ms 9580 KB Output is correct
26 Correct 27 ms 10604 KB Output is correct
27 Correct 54 ms 26476 KB Output is correct
28 Correct 99 ms 17644 KB Output is correct
29 Correct 125 ms 17772 KB Output is correct
30 Correct 88 ms 15212 KB Output is correct
31 Correct 75 ms 15212 KB Output is correct
32 Correct 28 ms 11244 KB Output is correct
33 Correct 91 ms 17644 KB Output is correct
34 Correct 117 ms 17772 KB Output is correct
35 Correct 98 ms 16492 KB Output is correct
36 Correct 82 ms 15212 KB Output is correct
37 Correct 93 ms 18540 KB Output is correct
38 Correct 88 ms 32364 KB Output is correct