oj.uz

Submission #651320

# Submission time Handle Problem Language Result Execution time Memory
651320 2022-10-18T09:36:10 Z therealpain Dreaming (IOI13_dreaming) C++14
32 / 100
 73 ms 14072 KB 
#include "dreaming.h"
#include <bits/stdc++.h> 
#define fi first 
#define se second
#define mp make_pair
#define getbit(x, i) (((x) >> (i)) & 1)
#define all(x) x.begin(), x.end()
#define TASK "DREAMING"
 
using namespace std;
 
template <typename T1, typename T2> bool mini(T1 &a, T2 b) {
	if (a > b) {a = b; return true;} return false;
}
template <typename T1, typename T2> bool maxi(T1 &a, T2 b) {
	if (a < b) {a = b; return true;} return false;
}
 
const long long inf = 1e18;
const int mod = 1e9 + 7;
const int N = 1e5 + 7;

long long dp[N][2], g[N], d[N], ans;
pair <long long, int> center_dist;
vector <pair <int, int>> a[N];
bool visited[N];
int n, m, l;

void dfs1(int u, int p) {
	visited[u] = 1;
	for (auto i : a[u]) {
		if (i.fi == p) continue;
		int v = i.fi, w = i.se;
		dfs1(v, u);
		if (dp[u][0] < dp[v][0] + w) {
			dp[u][1] = dp[u][0];
			dp[u][0] = dp[v][0] + w;
		} else if (dp[v][0] + w > dp[u][1]) 
			dp[u][1] = dp[v][0] + w; 
	}
	maxi(ans, dp[u][0] + dp[u][1]);
}

void dfs2(int u, int p, long long w) {
	if (p != u) g[u] = max(g[p] + w, (dp[u][0] + w == dp[p][0] ? (dp[p][1] + w) : dp[p][0]));
	mini(center_dist, mp(max(g[u], dp[u][0]),  u));
	for (auto i : a[u]) {
		if (i.fi == p) continue;
		int v = i.fi, w2 = i.se;
		dfs2(v, u, w2); 
	} 
}

int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	n = N;
    m = M;
    l = L;
	for (int i = 0; i < m; ++i) {
		int u = ++A[i], v = ++B[i], w = T[i]; 
		a[u].push_back({v, w});
		a[v].push_back({u, w});
	}
	vector <pair <int, int>> v;
	for (int i = 1; i <= n; ++i) {
		if (visited[i] == 1) continue;
		dfs1(i, i);
		center_dist = mp(1e9 + 9, 0); 
		dfs2(i, i, 0);
		v.push_back(center_dist);
	}
	sort(all(v), greater <pair <int, int>>());
	for (int i = 1; i < v.size(); ++i) {
		a[v[0].se].emplace_back(v[i].se, l);
		a[v[i].se].emplace_back(v[0].se, l);
	}
	memset(dp, 0, sizeof dp);
	ans = 0;
	dfs1(1, 1);
	return ans;
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:72:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   72 |  for (int i = 1; i < v.size(); ++i) {
      |                  ~~^~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 14072 KB Output is correct
2 Correct 48 ms 13776 KB Output is correct
3 Correct 36 ms 12296 KB Output is correct
4 Correct 8 ms 5588 KB Output is correct
5 Correct 8 ms 5104 KB Output is correct
6 Correct 13 ms 6388 KB Output is correct
7 Correct 3 ms 4200 KB Output is correct
8 Correct 24 ms 8292 KB Output is correct
9 Correct 33 ms 10552 KB Output is correct
10 Correct 3 ms 4308 KB Output is correct
11 Correct 73 ms 11588 KB Output is correct
12 Correct 68 ms 12688 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 3 ms 4200 KB Output is correct
3 Correct 2 ms 4200 KB Output is correct
4 Correct 3 ms 4200 KB Output is correct
5 Correct 2 ms 4192 KB Output is correct
6 Incorrect 3 ms 4180 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 14072 KB Output is correct
2 Correct 48 ms 13776 KB Output is correct
3 Correct 36 ms 12296 KB Output is correct
4 Correct 8 ms 5588 KB Output is correct
5 Correct 8 ms 5104 KB Output is correct
6 Correct 13 ms 6388 KB Output is correct
7 Correct 3 ms 4200 KB Output is correct
8 Correct 24 ms 8292 KB Output is correct
9 Correct 33 ms 10552 KB Output is correct
10 Correct 3 ms 4308 KB Output is correct
11 Correct 73 ms 11588 KB Output is correct
12 Correct 68 ms 12688 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct
14 Correct 2 ms 4180 KB Output is correct
15 Correct 3 ms 4200 KB Output is correct
16 Correct 2 ms 4200 KB Output is correct
17 Correct 3 ms 4200 KB Output is correct
18 Correct 2 ms 4192 KB Output is correct
19 Incorrect 3 ms 4180 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 42 ms 9640 KB Output is correct
2 Correct 44 ms 9748 KB Output is correct
3 Correct 31 ms 9728 KB Output is correct
4 Correct 36 ms 9756 KB Output is correct
5 Correct 36 ms 9728 KB Output is correct
6 Correct 34 ms 10572 KB Output is correct
7 Correct 39 ms 9992 KB Output is correct
8 Correct 39 ms 9564 KB Output is correct
9 Correct 43 ms 9592 KB Output is correct
10 Correct 35 ms 9924 KB Output is correct
11 Correct 2 ms 4180 KB Output is correct
12 Correct 17 ms 9696 KB Output is correct
13 Correct 15 ms 9636 KB Output is correct
14 Correct 15 ms 9460 KB Output is correct
15 Correct 16 ms 9556 KB Output is correct
16 Correct 17 ms 9416 KB Output is correct
17 Correct 15 ms 9172 KB Output is correct
18 Correct 21 ms 9696 KB Output is correct
19 Correct 17 ms 9392 KB Output is correct
20 Correct 2 ms 4200 KB Output is correct
21 Correct 2 ms 4188 KB Output is correct
22 Correct 3 ms 4328 KB Output is correct
23 Correct 15 ms 9412 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4180 KB Output is correct
2 Correct 3 ms 4200 KB Output is correct
3 Correct 2 ms 4200 KB Output is correct
4 Correct 3 ms 4200 KB Output is correct
5 Correct 2 ms 4192 KB Output is correct
6 Incorrect 3 ms 4180 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 14072 KB Output is correct
2 Correct 48 ms 13776 KB Output is correct
3 Correct 36 ms 12296 KB Output is correct
4 Correct 8 ms 5588 KB Output is correct
5 Correct 8 ms 5104 KB Output is correct
6 Correct 13 ms 6388 KB Output is correct
7 Correct 3 ms 4200 KB Output is correct
8 Correct 24 ms 8292 KB Output is correct
9 Correct 33 ms 10552 KB Output is correct
10 Correct 3 ms 4308 KB Output is correct
11 Correct 73 ms 11588 KB Output is correct
12 Correct 68 ms 12688 KB Output is correct
13 Correct 3 ms 4308 KB Output is correct
14 Correct 2 ms 4180 KB Output is correct
15 Correct 3 ms 4200 KB Output is correct
16 Correct 2 ms 4200 KB Output is correct
17 Correct 3 ms 4200 KB Output is correct
18 Correct 2 ms 4192 KB Output is correct
19 Incorrect 3 ms 4180 KB Output isn't correct
20 Halted 0 ms 0 KB -