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Submission #679538

# Submission time Handle Problem Language Result Execution time Memory
679538 2023-01-08T13:02:19 Z Dan4Life Swapping Cities (APIO20_swap) C++17
6 / 100
 490 ms 66460 KB 
#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back

const int maxn = (int)5e5+10;
const int lgn = 20;

int n, m, num;
int jmp[lgn][maxn];
vector<int> adj[maxn];
bool line[maxn], good[maxn];
struct Edge{ int u, v, w; };
int p[maxn], lev[maxn], wei[maxn], deg[maxn];

Edge edge[maxn];

int getPath(int x, int steps){
	for(int i = lgn-1; i >= 0; i--)
		if(steps&(1<<i) and x!=-1) x = jmp[i][x];
	return x; 
}

int lca(int a, int b){
	if(a==b) return a;
	if(jmp[0][a]==jmp[0][b]) return jmp[0][a];
	if(lev[a] < lev[b]) swap(a,b);
	a = getPath(a, lev[a]-lev[b]);
	for(int i = lgn-1; i >= 0; i--)
		if(jmp[i][a]!=-1 and jmp[i][a]!=jmp[i][b])
			a = jmp[i][a], b = jmp[i][b];
	return lca(a,b);
}

int findSet(int i){ return p[i]==i?i:p[i]=findSet(p[i]); }
bool isSameSet(int i, int j) { return findSet(i)==findSet(j); }

void unionSet(Edge &e){
	int i = e.u, j = e.v; wei[num] = e.w;
	int x = findSet(i), y = findSet(j);
	deg[x]++, deg[y]++;
	p[x]=p[y]=p[num]=num;
	if(x!=y) adj[num].pb(y);
	adj[num].pb(x); line[num]^=(x==y) | !line[x] | !line[y];
	good[num] |= good[x] or good[y] or !line[num] or (deg[x]>=3) or (deg[y]>=3);
	num++;
}

void dfs(int s, int p){
	if(p!=-1) lev[s] = lev[p]+1, jmp[0][s] = p;
	for(auto u : adj[s]) if(u!=p) dfs(u,s);
}

void init(int N, int M, vector<int> u, vector<int> v, vector<int> w) {
	n = N, m = M; num = n; memset(jmp,-1,sizeof(jmp));
	for(int i = 0; i <= n+m; i++) p[i] = i, line[i] = 1;
	for(int i = 0; i < m; i++) edge[i] = {u[i],v[i],w[i]};
	sort(edge,edge+m,[&](Edge &x, Edge &y){ return x.w<y.w; });
	for(int i = 0; i < m; i++) unionSet(edge[i]);
	dfs(num-1,-1);
	for(int i = 1; i < lgn; i++)
		for(int j = 0; j+(1<<i)-1 < num; j++)
			if(jmp[i-1][j]!=-1) jmp[i][j] = jmp[i-1][jmp[i-1][j]];
}

int getMinimumFuelCapacity(int x, int y) {
	int z = lca(x,y);
	for(int i = lgn-1; i >= 0; i--) 
		if(jmp[i][z]!=-1 and !good[jmp[i][z]]) z = jmp[i][z];
	if(good[z]) return wei[z];
	if(jmp[0][z]!=-1) z=jmp[0][z];
	return good[z]?wei[z]:-1;
}

/*
5 6
0 1 4
0 2 4
1 2 1
1 3 2
1 4 10
2 3 3
3
1 2
2 4
0 1
*/

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 51156 KB Output is correct
2 Correct 24 ms 51220 KB Output is correct
3 Correct 21 ms 51152 KB Output is correct
4 Correct 26 ms 51232 KB Output is correct
5 Correct 26 ms 51220 KB Output is correct
6 Correct 22 ms 51284 KB Output is correct
7 Correct 21 ms 51252 KB Output is correct
8 Correct 21 ms 51220 KB Output is correct
9 Correct 70 ms 58752 KB Output is correct
10 Correct 89 ms 60520 KB Output is correct
11 Correct 88 ms 60244 KB Output is correct
12 Correct 91 ms 60856 KB Output is correct
13 Correct 80 ms 63152 KB Output is correct
14 Correct 90 ms 58968 KB Output is correct
15 Correct 206 ms 62308 KB Output is correct
16 Correct 213 ms 62104 KB Output is correct
17 Correct 224 ms 62636 KB Output is correct
18 Correct 414 ms 64948 KB Output is correct
19 Correct 95 ms 56140 KB Output is correct
20 Correct 196 ms 63484 KB Output is correct
21 Correct 200 ms 63464 KB Output is correct
22 Correct 212 ms 64020 KB Output is correct
23 Correct 490 ms 66352 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 51156 KB Output is correct
2 Correct 24 ms 51220 KB Output is correct
3 Incorrect 465 ms 66460 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 51156 KB Output is correct
2 Correct 24 ms 51220 KB Output is correct
3 Correct 21 ms 51152 KB Output is correct
4 Correct 26 ms 51232 KB Output is correct
5 Correct 26 ms 51220 KB Output is correct
6 Correct 22 ms 51284 KB Output is correct
7 Correct 21 ms 51252 KB Output is correct
8 Correct 21 ms 51220 KB Output is correct
9 Correct 26 ms 51120 KB Output is correct
10 Incorrect 21 ms 51256 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 51120 KB Output is correct
2 Correct 21 ms 51156 KB Output is correct
3 Correct 24 ms 51220 KB Output is correct
4 Correct 21 ms 51152 KB Output is correct
5 Correct 26 ms 51232 KB Output is correct
6 Correct 26 ms 51220 KB Output is correct
7 Correct 22 ms 51284 KB Output is correct
8 Correct 21 ms 51252 KB Output is correct
9 Correct 21 ms 51220 KB Output is correct
10 Correct 70 ms 58752 KB Output is correct
11 Correct 89 ms 60520 KB Output is correct
12 Correct 88 ms 60244 KB Output is correct
13 Correct 91 ms 60856 KB Output is correct
14 Correct 80 ms 63152 KB Output is correct
15 Incorrect 21 ms 51256 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 21 ms 51156 KB Output is correct
2 Correct 24 ms 51220 KB Output is correct
3 Correct 21 ms 51152 KB Output is correct
4 Correct 26 ms 51232 KB Output is correct
5 Correct 26 ms 51220 KB Output is correct
6 Correct 22 ms 51284 KB Output is correct
7 Correct 21 ms 51252 KB Output is correct
8 Correct 21 ms 51220 KB Output is correct
9 Correct 70 ms 58752 KB Output is correct
10 Correct 89 ms 60520 KB Output is correct
11 Correct 88 ms 60244 KB Output is correct
12 Correct 91 ms 60856 KB Output is correct
13 Correct 80 ms 63152 KB Output is correct
14 Correct 90 ms 58968 KB Output is correct
15 Correct 206 ms 62308 KB Output is correct
16 Correct 213 ms 62104 KB Output is correct
17 Correct 224 ms 62636 KB Output is correct
18 Correct 414 ms 64948 KB Output is correct
19 Incorrect 465 ms 66460 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 26 ms 51120 KB Output is correct
2 Correct 21 ms 51156 KB Output is correct
3 Correct 24 ms 51220 KB Output is correct
4 Correct 21 ms 51152 KB Output is correct
5 Correct 26 ms 51232 KB Output is correct
6 Correct 26 ms 51220 KB Output is correct
7 Correct 22 ms 51284 KB Output is correct
8 Correct 21 ms 51252 KB Output is correct
9 Correct 21 ms 51220 KB Output is correct
10 Correct 70 ms 58752 KB Output is correct
11 Correct 89 ms 60520 KB Output is correct
12 Correct 88 ms 60244 KB Output is correct
13 Correct 91 ms 60856 KB Output is correct
14 Correct 80 ms 63152 KB Output is correct
15 Correct 90 ms 58968 KB Output is correct
16 Correct 206 ms 62308 KB Output is correct
17 Correct 213 ms 62104 KB Output is correct
18 Correct 224 ms 62636 KB Output is correct
19 Correct 414 ms 64948 KB Output is correct
20 Incorrect 465 ms 66460 KB Output isn't correct
21 Halted 0 ms 0 KB -