Submission #973620

#	Time	Username	Problem	Language	Result	Execution time	Memory
973620		steveonalex	Speedrun (RMI21_speedrun)	C++17	29 / 100	26 ms	1736 KiB

speedrun

#include <bits/stdc++.h>
#include "speedrun.h"
 
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
 
#define MASK(i) (1LL << (i))
#define GETBIT(mask, i) (((mask) >> (i)) & 1)
#define ALL(v) (v).begin(), (v).end()
 
ll max(ll a, ll b){return (a > b) ? a : b;}
ll min(ll a, ll b){return (a < b) ? a : b;}
 
ll LASTBIT(ll mask){return (mask) & (-mask);}
int pop_cnt(ll mask){return __builtin_popcountll(mask);}
int ctz(ll mask){return __builtin_ctzll(mask);}
int logOf(ll mask){return __lg(mask);}
 
// mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
mt19937_64 rng(1);
ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);}
 
template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }
 
template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }
 
template <class T>
    void printArr(T& container, string separator = " ", string finish = "\n"){
        for(auto item: container) cout << item << separator;
        cout << finish;
    }
 
 
template <class T>
    void remove_dup(vector<T> &a){
        sort(ALL(a));
        a.resize(unique(ALL(a)) - a.begin());
    }
 
const int N = 1001;

namespace Sub1{
    void assignHints (int subtask, int n, int A[], int B[]){
        vector<vector<int>> graph(n+1);
        for(int i = 1; i<=n-1; ++i){
            int u = A[i], v = B[i];
            graph[u].push_back(v);
            graph[v].push_back(u);
        }
     
        setHintLen(n);
        for(int i = 1; i<=n; ++i){
            for(int j: graph[i]){
                setHint(i, j, 1);
            }
        }
    }


    int hint_length;
    bool visited[N];


    void dfs(int u, int p){
        visited[u] = true;
        for(int j = 1; j <= hint_length; ++j) if (!visited[j] && getHint(j)){
            goTo(j);
            dfs(j, u);
        }
        if (p != u) goTo(p);
    }

    void speedrun(int subtask , int N, int start ){
        hint_length = getLength();
        dfs(start, start);
    }

}

namespace Sub2{
    void assignHints (int subtask, int n, int A[], int B[]){
        vector<vector<int>> graph(n+1);
        for(int i = 1; i<=n-1; ++i){
            int u = A[i], v = B[i];
            graph[u].push_back(v);
            graph[v].push_back(u);
        }
     
        pair<int, int> max_deg = {0, 0};
        for(int i = 1; i<=n; ++i) maximize(max_deg, make_pair((int)graph[i].size(), i));

        int centroid = max_deg.second;
        setHintLen(10);

        for(int i = 1; i<=n; ++i) {
            for(int j = 0; j < 10; ++j) if (GETBIT(centroid, j)) 
                setHint(i, j + 1, 1);
        }
    }


    int hint_length;
    vector<int> graph[N];

    void dfs(int u, int p){
        for(int v: graph[u]) if (v != p){
            goTo(v);
            dfs(v, u);
        }
        if (p != u) goTo(p);
    }

    void speedrun(int subtask , int n, int start ){
        hint_length = getLength();

        int centroid = 0;
        for(int j = 1; j <= hint_length; ++j) if (getHint(j)) centroid += MASK(j - 1);

        for(int i = 1; i <= n; ++i){
            if (i != centroid){
                graph[i].push_back(centroid);
                graph[centroid].push_back(i);
            }
        }

        dfs(start, start);
    }

}
 
void assignHints (int subtask, int n, int A[], int B[]){
    if (subtask == 1) Sub1::assignHints(subtask, n, A, B);
    if (subtask == 2) Sub2::assignHints(subtask, n, A, B);
}
 
 
 
void speedrun(int subtask , int N, int start ){
    if (subtask == 1) Sub1::speedrun(subtask, N, start);
    if (subtask == 2) Sub2::speedrun(subtask, N, start);
}
 
// int main(void){
//     ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
 
//     return 0;
// }

• Subtask 1: 21 / 21
• Subtask 2: 8 / 8
• Subtask 3: 0 / 19
• Subtask 4: 0 / 12
• Subtask 5: 0 / 40