Submission #762353

#	Time	Username	Problem	Language	Result	Execution time	Memory
762353		phoebe	Stray Cat (JOI20_stray)	C++17	86 / 100	41 ms	16844 KiB

Anthony

#include <bits/stdc++.h>
#include "Anthony.h"
using namespace std;

#define pii pair<int, int>
#define F first
#define S second

static const int maxn = 2e4 + 10;
static int n, m, a, b, 
seq[] = {0, 1, 0, 1, 1, 0},
dist[maxn];
static vector<pii> adj[maxn];
static vector<int> x;

void mark1(){
    fill(dist, dist + n, -1);
    queue<int> q; 
    q.push(0); dist[0] = 0;
    while (!q.empty()){
        int v = q.front(); q.pop();
        for (auto k : adj[v]){
            int u = k.F, i = k.S;
            if (dist[u] != -1) continue;
            dist[u] = dist[v] + 1;
            q.push(u);
        }
    }
}

void mark2(int v, int p, int last_idx){
    int cnt_children = 0, next_idx;
    for (auto k : adj[v]){
        int u = k.F, i = k.S;
        if (u != p) cnt_children++;
    }
    if (cnt_children <= 1){ // line
        next_idx = (last_idx == 5 ? 0 : last_idx + 1);
    }
    else{ // multiple children
        next_idx = (seq[last_idx] == 0 ? 1 : 0);
    }
    for (auto k : adj[v]){
        int u = k.F, i = k.S;
        if (u == p) continue;
        x[i] = seq[next_idx];
        mark2(u, v, next_idx);
    }
}

vector<int> Mark(int N, int M, int A, int B, 
vector<int> U, vector<int> V){
    n = N, m = M, a = A, b = B;
    x.resize(m, -1);
    for (int i = 0; i < m; i++){
        adj[U[i]].push_back({V[i], i});
        adj[V[i]].push_back({U[i], i});
    }
    if (a >= 3){ // type 1: bfs tree; 2 -> 1 -> 0
        mark1();
        for (int v = 0; v < n; v++){
            for (auto k : adj[v]){
                int u = k.F, i = k.S;
                if (dist[u] < dist[v]) x[i] = dist[u] % 3;
                else x[i] = dist[v] % 3;
            }
        }
    }
    else{
        mark2(0, 0, 0);
        // for (int v = 0; v < n; v++){
        //     cout << v << endl;
        //     for (auto k : adj[v]){
        //         cout << "to " << k.F << ": " << x[k.S] << endl;
        //     }
        //     cout << endl;
        //     cout << endl;
        // }
    }
    return x;
}

Catherine

#include <bits/stdc++.h>
#include "Catherine.h"
using namespace std;

#define pii pair<int, int>
#define F first
#define S second

static const int maxn = 2e4 + 10;
static int n, m, a, b, last = -1,
seq[] = {0, 1, 0, 1, 1, 0};
static bool is_type_1, found_direction = false, 
is_backtracking = false;
static vector<int> bruh;

void Init(int A, int B){
    a = A, b = B;
    if (a >= 3) is_type_1 = true;
    else is_type_1 = false;
}

int Move(vector<int> y){
    if (is_type_1){
        // for (auto k : y) cout << k << ' '; cout << endl;
        for (int i = 0; i < a; i++){
            int next = (i == 0 ? 2 : i - 1);
            if (y[i] > 0 && y[next] == 0) return i;
        }
        return -1;
    }
    else{
        if (found_direction){
            int cnt = y[0] + y[1] + 1, next;
            if (cnt >= 3){ // not line
                y[last]++;
                next = (y[0] < y[1] ? 0 : 1);
            }
            else{ // is line
                next = (y[0] == 0 ? 1 : 0);
            }
            last = next;
            return next;
        }
        if (is_backtracking){
            last = bruh.back(); bruh.pop_back();
            if (bruh.empty()) found_direction = true;
            return last;
        }
        else{
            vector<int> x = y;
            if (last != -1) x[last]++;
            int cnt = x[0] + x[1], next;
            if (cnt >= 3){ // not line
                found_direction = true;
                next = (x[0] < x[1] ? 0 : 1);
                last = next;
                return next;
            }
            else{
                if (last == -1){ // first one
                    if (cnt == 1){
                        found_direction = true;
                        last = (y[0] ? 0 : 1);
                    }
                    else if (y[0] == 2){
                        bruh.push_back(0);
                        last = 0;
                    }
                    else if (y[0] == 1){
                        bruh.push_back(0);
                        last = 1;
                    }
                    else if (y[0] == 0){
                        bruh.push_back(1);
                        last = 1;
                    }
                    // cout << last << endl;
                    bruh.push_back(last);
                    return last;
                }
                else if (bruh.size() <= 3){
                    if (cnt == 1){
                        is_backtracking = true;
                        last = bruh.back(); bruh.pop_back();
                        return -1;
                    }
                    last = (y[0] ? 0 : 1);
                    bruh.push_back(last);
                    return last;
                }
                else{ // completed
                    if (cnt == 1){
                        is_backtracking = true;
                        last = bruh.back(); bruh.pop_back();
                        return -1;
                    }
                    bruh.push_back(y[0] ? 0 : 1);
                    // for (auto k : bruh) cout << k << ' '; cout << endl;
                    bool is_right = false;
                    for (int start = 0; start < 6; start++){
                        bool pos = true;
                        for (int i = 0; i < 5; i++){
                            if (bruh[i] != seq[(start - i + 6) % 6]) pos = false;
                        }
                        if (pos) is_right = true;
                    }
                    if (is_right){
                        // cout << "right" << endl;
                        found_direction = true;
                        last = bruh.back();
                        return last;
                    }
                    else{
                        // cout << "bruh" << endl;
                        bruh.pop_back();
                        is_backtracking = true;
                        last = bruh.back(); bruh.pop_back();
                        return -1;
                    }
                }
            }
        }
    }
    return -1;
}

Compilation message (stderr)

Anthony.cpp: In function 'void mark1()':
Anthony.cpp:23:26: warning: unused variable 'i' [-Wunused-variable]
   23 |             int u = k.F, i = k.S;
      |                          ^
Anthony.cpp: In function 'void mark2(int, int, int)':
Anthony.cpp:34:22: warning: unused variable 'i' [-Wunused-variable]
   34 |         int u = k.F, i = k.S;
      |                      ^

Catherine.cpp:10:15: warning: 'm' defined but not used [-Wunused-variable]
   10 | static int n, m, a, b, last = -1,
      |               ^
Catherine.cpp:10:12: warning: 'n' defined but not used [-Wunused-variable]
   10 | static int n, m, a, b, last = -1,
      |            ^

• Subtask 1: 2 / 2
• Subtask 2: 2 / 2
• Subtask 3: 2 / 2
• Subtask 4: 9 / 9
• Subtask 5: 0 / 5
• Subtask 6: 71 / 71
• Subtask 7: 0 / 9