Submission #986378

#	Time	Username	Problem	Language	Result	Execution time	Memory
986378		KasymK	Race (IOI11_race)	C++17	0 / 100	2 ms	2396 KiB

race

#include "bits/stdc++.h"
#include "race.h"
using namespace std;

const int Na = 1e3 + 5;

vector<pair<int, int>> adj[Na];
 
int mn = Na, Ka;

int dfs(int x, int pr, int gal, int edge){
	if(!(gal^Ka))
		return edge;
	if(gal < 0)
		return Na;
	for(auto &i : adj[x])
		if(i.first != pr)
			mn = min(mn, dfs(i.first, x, gal + i.second, edge + 1));
	return mn;
}

int best_path(int n, int k, int H[][2], int L[]){
	Ka = k;
	for(int i = 0; i < n; ++i){
		int a = H[i][0], b = H[i][1];
		adj[a].push_back({b, L[i]});
		adj[b].push_back({a, L[i]});
	}
	int answer = INT_MAX;
	for(int i = 0; i < n; ++i) 
		answer = min(answer, dfs(i, -1, 0, 0));
	return (answer >= Na ? -1 : answer);
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 12
• Subtask 3: 0 / 22
• Subtask 4: 0 / 57