Submission #1227972

#	Time	Username	Problem	Language	Result	Execution time	Memory
1227972		HishamAlshehri	Cop and Robber (BOI14_coprobber)	C++20	16 / 100	39 ms	25416 KiB

coprobber

#include "coprobber.h"
#include <bits/stdc++.h>
// #include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/tree_policy.hpp>
 
using namespace std;
// using namespace __gnu_pbds;
 
// #define int long long
#define mod 1000000007
#define base 7001
#define base2 757
#define F first
#define S second
// #define pi acos(-1)
#define double long double
// #define ordered_set tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update>
// #define ordered_multiset tree<int, null_type, less_equal<int>, rb_tree_tag,tree_order_statistics_node_update>

// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,sse3,sse4,avx")

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

constexpr int maxn = 1000005;
// const int N = 1 << (int)(ceil(log2(maxn)));

vector<int> adj[maxn];
int cur, n, r, nxt;
bool vis[maxn];

int dfs(int v) {
    vis[v] = 1;
    int ret = -1;
    if (v == r) ret = v;
    for (int u : adj[v]) {
        if (!vis[u]) {
            ret = max(dfs(u), ret);
        }
    }

    nxt = ret;
    return (ret != -1 ? v : ret);
}

int start(int N, bool A[MAX_N][MAX_N])
{
    n = N;
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if (A[i][j]) adj[i].push_back(j);
        }
    }

    return 0;
}

int nextMove(int R)
{
    r = R;
    dfs(cur);
    for (int i = 0; i < n; i++) vis[i] = 0;
    return cur = nxt;
}

• Subtask 1: 16 / 16
• Subtask 2: 0 / 14
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40