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Submission #348992

# Submission time Handle Problem Language Result Execution time Memory
348992 2021-01-16T09:37:28 Z Mefarnis Tropical Garden (IOI11_garden) C++14
69 / 100
 5000 ms 82204 KB 
#include <bits/stdc++.h>
#include "garden.h"
#include "gardenlib.h"
#define maxk 30
#define maxn 150003
#define pb push_back
using namespace std;

int n;
int dp[maxn][2][maxk][2];
vector<int> adj[maxn];

void precalc() {
	memset(dp,-1,sizeof(dp));
	for( int u = 0 ; u < n ; u++ ) {
		int v = adj[u][0];
		dp[u][1][0][0] = v;
		if(adj[v].size() == 1)
			dp[u][1][0][1] = 1;
		else
			dp[u][1][0][1] = (adj[v][0] != u);
		if(adj[u].size() == 2) {
			v = adj[u][1];
			dp[u][0][0][0] = v;
			if(adj[v].size() == 1)
				dp[u][0][0][1] = 1;
			else
				dp[u][0][0][1] = (adj[v][0] != u);
		}
	}
	for( int k = 1 ; k < maxk ; k++ )
		for( int u = 0 ; u < n ; u++ )
			for( int st = 0 ; st < 2 ; st++ )
				if(dp[u][st][k-1][0] != -1) {
					int v = dp[u][st][k-1][0];
					int st2 = dp[u][st][k-1][1];
					dp[u][st][k][0] = dp[v][st2][k-1][0];
					dp[u][st][k][1] = dp[v][st2][k-1][1];
				}
}

int solve(int u , int d) {
	int st = 1;
	for( int i = maxk-1 ; i >= 0 ; i-- )
		if(d & (1<<i)) {
			int v = dp[u][st][i][0];
			int stv = dp[u][st][i][1];
			u = v;
			st = stv;
		}
	return u;
}

void count_routes(int N, int m, int p, int e[][2], int q, int dist[]) {
	n = N;
	for( int i = 0 ; i < m ; i++ ) {
		int u = e[i][0];
		int v = e[i][1];
		if(adj[u].size() < 2)
			adj[u].pb(v);
		if(adj[v].size() < 2)
			adj[v].pb(u);
	}
	precalc();
	for( int tc = 0 ; tc < q ; tc++ ) {
		int d = dist[tc] , ans = 0;
		for( int i = 0 ; i < n ; i++ )
			ans += (solve(i,d) == p);
		answer(ans);
	}
}

Subtask #1
49.0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 74496 KB Output is correct
2 Correct 42 ms 74368 KB Output is correct
3 Correct 42 ms 74348 KB Output is correct
4 Correct 42 ms 74348 KB Output is correct
5 Correct 44 ms 74348 KB Output is correct
6 Correct 42 ms 74348 KB Output is correct
7 Correct 41 ms 74476 KB Output is correct
8 Correct 43 ms 74348 KB Output is correct
9 Correct 44 ms 74368 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 74496 KB Output is correct
2 Correct 42 ms 74368 KB Output is correct
3 Correct 42 ms 74348 KB Output is correct
4 Correct 42 ms 74348 KB Output is correct
5 Correct 44 ms 74348 KB Output is correct
6 Correct 42 ms 74348 KB Output is correct
7 Correct 41 ms 74476 KB Output is correct
8 Correct 43 ms 74348 KB Output is correct
9 Correct 44 ms 74368 KB Output is correct
10 Correct 42 ms 74348 KB Output is correct
11 Correct 64 ms 75136 KB Output is correct
12 Correct 92 ms 76524 KB Output is correct
13 Correct 249 ms 78700 KB Output is correct
14 Correct 234 ms 81388 KB Output is correct
15 Correct 233 ms 81644 KB Output is correct
16 Correct 196 ms 79852 KB Output is correct
17 Correct 164 ms 79468 KB Output is correct
18 Correct 91 ms 76544 KB Output is correct
19 Correct 230 ms 81388 KB Output is correct
20 Correct 234 ms 81644 KB Output is correct
21 Correct 189 ms 79852 KB Output is correct
22 Correct 164 ms 79488 KB Output is correct
23 Correct 320 ms 82204 KB Output is correct

Subtask #3
0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 74496 KB Output is correct
2 Correct 42 ms 74368 KB Output is correct
3 Correct 42 ms 74348 KB Output is correct
4 Correct 42 ms 74348 KB Output is correct
5 Correct 44 ms 74348 KB Output is correct
6 Correct 42 ms 74348 KB Output is correct
7 Correct 41 ms 74476 KB Output is correct
8 Correct 43 ms 74348 KB Output is correct
9 Correct 44 ms 74368 KB Output is correct
10 Correct 42 ms 74348 KB Output is correct
11 Correct 64 ms 75136 KB Output is correct
12 Correct 92 ms 76524 KB Output is correct
13 Correct 249 ms 78700 KB Output is correct
14 Correct 234 ms 81388 KB Output is correct
15 Correct 233 ms 81644 KB Output is correct
16 Correct 196 ms 79852 KB Output is correct
17 Correct 164 ms 79468 KB Output is correct
18 Correct 91 ms 76544 KB Output is correct
19 Correct 230 ms 81388 KB Output is correct
20 Correct 234 ms 81644 KB Output is correct
21 Correct 189 ms 79852 KB Output is correct
22 Correct 164 ms 79488 KB Output is correct
23 Correct 320 ms 82204 KB Output is correct
24 Correct 53 ms 74348 KB Output is correct
25 Execution timed out 5056 ms 75628 KB Time limit exceeded
26 Halted 0 ms 0 KB -