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Submission #678164

# Submission time Handle Problem Language Result Execution time Memory
678164 2023-01-05T09:24:21 Z Dan4Life Swapping Cities (APIO20_swap) C++17
0 / 100
 113 ms 15160 KB 
#include "swap.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define fi first
#define se second
#define SZ(a) (int)a.size()
using ll = long long;

const int maxn = (int)1e5+10;
const ll LINF = (ll)1e18;

vector<pair<int,int>> adj[maxn];
ll dis[maxn];
int par[maxn];

void dfs(int s, int p, int d=0){
	dis[s]=d; par[s]=p;
	for(auto u : adj[s]){
		if(u.fi!=p) dfs(u.fi,s, d+u.se);
	}
}

void init(int N, int M, vector<int> u, vector<int> v, vector<int> w) {
	for(int i = 0; i < M; i++){
		adj[u[i]].pb({v[i],w[i]});
		adj[v[i]].pb({u[i],w[i]});
	}
	for(int i = 1; i <= N; i++){
		if(SZ(adj[i])==2) continue;
		dfs(i,-1); break;
	}
}
/*
5 4
1 2 3
2 3 4
3 4 5
4 5 6
4
1 2
1 5
2 5
2 4
*/

int getMinimumFuelCapacity(int x, int y) {
	if(dis[x]>dis[y]) swap(x,y);
	if(SZ(adj[x])==1 and SZ(adj[y])==1) return -1;
	ll sum = dis[y]-dis[x], edgex = LINF, edgey=LINF;
	if(SZ(adj[y])!=1)
		for(auto u : adj[y])
			if(dis[u.fi]>dis[y]) edgey=u.se;
	if(SZ(adj[x])!=1)
		for(auto u : adj[x])
			if(dis[u.fi]<dis[x]) edgex=u.se;
	return sum+min(edgex,edgey);
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 3 ms 2644 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 113 ms 15160 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 3 ms 2644 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 3 ms 2644 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 3 ms 2644 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Incorrect 3 ms 2644 KB Output isn't correct
4 Halted 0 ms 0 KB -