Submission #1000788

#	Time	Username	Problem	Language	Result	Execution time	Memory
1000788		uranhishig	Race (IOI11_race)	C++14	21 / 100	3036 ms	29520 KiB

race

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef vector<vi> vvi;
typedef vector<vl> vvl;
typedef pair<int,int> pii;
typedef pair<double, double> pdd;
typedef pair<ll, ll> pll;
typedef vector<pii> vii;
typedef vector<pll> vll;
typedef double dl;
#define f first
#define s second
#define mp make_pair
#define pb push_back
#define all(a) (a).begin(),(a).end()
#define sz(x) (int)x.size()
#define mid(l,r) ((r+l)/2)
#define left(node) (node*2)
#define right(node) (node*2+1)
#define mx_int_prime 999999937
#define mod 1000000007
#define mem(a,b) memset(a, b, sizeof(a) )
#define gcd(a,b) __gcd(a,b)
#define lcm(a, b) (a * b) / gcd(a, b)
#define sqr(a) ((a) * (a))
#define faster ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define fastio cin.tie(0)->sync_with_stdio(0)
#define print(x) cout << x << "\n"
#define rep(i, n) for(int i = 0; i < (n); i++)
#define rep1(i, n) for(int i = 1; i <= (n); i++)
#define yes cout << "YES" << endl;
#define no cout << "NO" << endl;
const int MAXN = 1e6;
vector<pair<int, int>> adj[MAXN]; 
bool visited[MAXN]; 
int mi = INT_MAX;

void dfs(int node, int x, int y, int z) {
    visited[node] = true;
    if (x == y) {
        mi = min(mi, z);
    }
	else {
        for (auto neighbor : adj[node]) {
            int nextCity = neighbor.f;
            int length = neighbor.s;
            
            if (!visited[nextCity] && x + length <= y) {
                dfs(nextCity, x + length, y, z + 1);
            }
        }
    }  
    visited[node] = false; 
}

int best_path(int N, int K, int H[][2], int L[]) {
    rep(i, N-1) {
        int city1 = H[i][0], city2 = H[i][1], length = L[i];
        adj[city1].emplace_back(city2, length);
        adj[city2].emplace_back(city1, length);
    }
    mi = INT_MAX;
    for (int st = 0; st < N; st++) {
        memset(visited, false, sizeof(visited));
        dfs(st, 0, K, 0);
    }
    if (mi == INT_MAX) {
        return -1;
    } else {
        return mi;
    }
}

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