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Submission #1050146

# Submission time Handle Problem Language Result Execution time Memory
1050146 2024-08-09T07:41:55 Z idas Stations (IOI20_stations) C++17
100 / 100
 523 ms 1048 KB 
#include "stations.h"
#include "bits/stdc++.h"
#define FOR(i, begin, end) for(int i=(begin); i<(end); i++)
#define sz(x) ((int)((x).size()))
#define pb push_back

using namespace std;
typedef vector<int> vi;

const int N=1e3+10;
int in[N], dp[N], id;
vi ad[N];

void dfs(int u, int pst=-1) {
	if(dp[u]&1^1) in[u]=id++;
	for(auto it : ad[u]) {
		if(it==pst) continue;
		dp[it]=dp[u]+1;
		dfs(it, u);
	}
	if(dp[u]&1) in[u]=id++;
}

std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
	FOR(i, 0, n) ad[i].clear(), dp[i]=in[i]=0;
	FOR(i, 0, n-1) {
		ad[u[i]].pb(v[i]), ad[v[i]].pb(u[i]);
	}
	id=0; dfs(0);
	vi b(n); FOR(i, 0, n) b[i]=in[i];
	return b;
}

int find_next_station(int s, int t, std::vector<int> c) {
	if(s<c[0]) {
		if(t<s) return c[sz(c)-1];
		FOR(i, 0, sz(c)) {
			if(t<=c[i]) return c[i];
		}
		return c[sz(c)-1];
	}
	else {
		if(t>s) return c[0];
		for(int i=sz(c)-1; i>=0; i--) {
			if(t>=c[i]) return c[i];
		}
		return c[0];
	}
}
/*
2
5 10
0 1
1 2
1 3
2 4
2
2 0 1
1 3 3
5 10
0 1
1 2
2 3
3 4
1
4 0 2
*/

Compilation message

stations.cpp: In function 'void dfs(int, int)':
stations.cpp:15:10: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   15 |  if(dp[u]&1^1) in[u]=id++;
      |     ~~~~~^~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 311 ms 684 KB Output is correct
2 Correct 230 ms 684 KB Output is correct
3 Correct 513 ms 684 KB Output is correct
4 Correct 387 ms 684 KB Output is correct
5 Correct 304 ms 684 KB Output is correct
6 Correct 282 ms 684 KB Output is correct
7 Correct 266 ms 684 KB Output is correct
8 Correct 0 ms 768 KB Output is correct
9 Correct 1 ms 776 KB Output is correct
10 Correct 0 ms 776 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 258 ms 716 KB Output is correct
2 Correct 295 ms 708 KB Output is correct
3 Correct 523 ms 684 KB Output is correct
4 Correct 361 ms 784 KB Output is correct
5 Correct 324 ms 684 KB Output is correct
6 Correct 296 ms 684 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 328 ms 684 KB Output is correct
2 Correct 238 ms 684 KB Output is correct
3 Correct 520 ms 684 KB Output is correct
4 Correct 399 ms 684 KB Output is correct
5 Correct 326 ms 684 KB Output is correct
6 Correct 246 ms 684 KB Output is correct
7 Correct 271 ms 684 KB Output is correct
8 Correct 1 ms 776 KB Output is correct
9 Correct 2 ms 768 KB Output is correct
10 Correct 0 ms 772 KB Output is correct
11 Correct 322 ms 800 KB Output is correct
12 Correct 270 ms 796 KB Output is correct
13 Correct 277 ms 936 KB Output is correct
14 Correct 235 ms 684 KB Output is correct
15 Correct 24 ms 768 KB Output is correct
16 Correct 28 ms 768 KB Output is correct
17 Correct 45 ms 716 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 523 ms 684 KB Output is correct
2 Correct 367 ms 684 KB Output is correct
3 Correct 333 ms 684 KB Output is correct
4 Correct 2 ms 768 KB Output is correct
5 Correct 1 ms 776 KB Output is correct
6 Correct 0 ms 776 KB Output is correct
7 Correct 353 ms 800 KB Output is correct
8 Correct 516 ms 684 KB Output is correct
9 Correct 390 ms 684 KB Output is correct
10 Correct 309 ms 684 KB Output is correct
11 Correct 2 ms 768 KB Output is correct
12 Correct 3 ms 768 KB Output is correct
13 Correct 2 ms 764 KB Output is correct
14 Correct 1 ms 768 KB Output is correct
15 Correct 0 ms 776 KB Output is correct
16 Correct 275 ms 684 KB Output is correct
17 Correct 246 ms 684 KB Output is correct
18 Correct 284 ms 684 KB Output is correct
19 Correct 288 ms 688 KB Output is correct
20 Correct 277 ms 684 KB Output is correct

Subtask #5
61.0 / 61.0

# Verdict Execution time Memory Grader output
1 Correct 286 ms 684 KB Output is correct
2 Correct 240 ms 684 KB Output is correct
3 Correct 512 ms 684 KB Output is correct
4 Correct 365 ms 684 KB Output is correct
5 Correct 367 ms 684 KB Output is correct
6 Correct 270 ms 684 KB Output is correct
7 Correct 237 ms 684 KB Output is correct
8 Correct 0 ms 764 KB Output is correct
9 Correct 1 ms 768 KB Output is correct
10 Correct 1 ms 772 KB Output is correct
11 Correct 254 ms 804 KB Output is correct
12 Correct 285 ms 684 KB Output is correct
13 Correct 488 ms 684 KB Output is correct
14 Correct 327 ms 940 KB Output is correct
15 Correct 296 ms 792 KB Output is correct
16 Correct 195 ms 792 KB Output is correct
17 Correct 273 ms 796 KB Output is correct
18 Correct 196 ms 1048 KB Output is correct
19 Correct 215 ms 784 KB Output is correct
20 Correct 212 ms 684 KB Output is correct
21 Correct 24 ms 768 KB Output is correct
22 Correct 37 ms 768 KB Output is correct
23 Correct 61 ms 716 KB Output is correct
24 Correct 2 ms 768 KB Output is correct
25 Correct 3 ms 776 KB Output is correct
26 Correct 1 ms 768 KB Output is correct
27 Correct 1 ms 768 KB Output is correct
28 Correct 0 ms 768 KB Output is correct
29 Correct 244 ms 940 KB Output is correct
30 Correct 263 ms 684 KB Output is correct
31 Correct 229 ms 684 KB Output is correct
32 Correct 264 ms 684 KB Output is correct
33 Correct 254 ms 796 KB Output is correct
34 Correct 162 ms 684 KB Output is correct
35 Correct 250 ms 920 KB Output is correct
36 Correct 273 ms 1024 KB Output is correct
37 Correct 238 ms 684 KB Output is correct
38 Correct 264 ms 932 KB Output is correct
39 Correct 266 ms 940 KB Output is correct
40 Correct 214 ms 812 KB Output is correct
41 Correct 280 ms 932 KB Output is correct
42 Correct 25 ms 768 KB Output is correct
43 Correct 64 ms 736 KB Output is correct
44 Correct 57 ms 684 KB Output is correct
45 Correct 85 ms 768 KB Output is correct
46 Correct 174 ms 716 KB Output is correct
47 Correct 190 ms 684 KB Output is correct
48 Correct 32 ms 912 KB Output is correct
49 Correct 23 ms 768 KB Output is correct