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답안 #946821

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
946821 2024-03-15T05:43:17 Z GrindMachine Star Trek (CEOI20_startrek) C++17
23 / 100
 1000 ms 12880 KB 
#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;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<ll> adj[N];
vector<ll> dp1(N), dp2(N), dp3(N);

void dfs1(ll u, ll p){
    dp1[u] = 0;
    trav(v,adj[u]){
        if(v == p) conts;
        dfs1(v,u);
        dp1[u] |= dp1[v]^1;
    }
}

void dfs3(ll u, ll p, ll depth){
    if(!dp1[u]){
        if(depth&1) dp3[u] = 0;
        else dp3[u] = 1;
    }

    vector<ll> win,lose;
    trav(v,adj[u]){
        if(v == p) conts;
        if(dp1[v]) win.pb(v);
        else lose.pb(v);
    }

    if(sz(lose) == 0){
        trav(v,win){
            dfs3(v,u,depth+1);
        }
    }
    else if(sz(lose) == 1){
        dfs3(lose[0],u,depth+1);
    }
}

void solve(int test_case)
{
    ll n,d; cin >> n >> d;
    rep1(i,n-1){
        ll u,v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }

    rep1(i,n){
        dfs1(i,-1);
        dp2[i] = dp1[i];
    }

    dfs1(1,-1);
    auto odp1 = dp1;

    rep1(i,n){
        dp3[i] = dp2[1];
    }
    dfs3(1,-1,0);

    rep1(i,n){
        debug(dp3[i]);
    }

    ll lose_cnt = 0;
    rep1(i,n) lose_cnt += dp2[i]^1;

    ll ans = 0;

    rep1(u,n){
        ll ways = 0;
        if(odp1[u]){
            if(dp2[1]){
                ways = n;
            }
        }
        else{
            if(dp2[1]){
                ways = n-lose_cnt;
            }
            if(dp3[u]){
                ways += lose_cnt;
            }
        }

        ans += ways;
    }

    ans %= MOD;
    cout << ans << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Compilation message

startrek.cpp: In function 'void solve(int)':
startrek.cpp:46:18: warning: statement has no effect [-Wunused-value]
   46 | #define debug(x) 42
      |                  ^~
startrek.cpp:117:9: note: in expansion of macro 'debug'
  117 |         debug(dp3[i]);
      |         ^~~~~

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Incorrect 8 ms 5980 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 5724 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 2 ms 5724 KB Output is correct
3 Correct 3 ms 5980 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5720 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct

Subtask #4
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 2 ms 5724 KB Output is correct
3 Correct 3 ms 5980 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5720 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 12 ms 5988 KB Output is correct
8 Correct 15 ms 5980 KB Output is correct
9 Correct 7 ms 5984 KB Output is correct
10 Correct 9 ms 5988 KB Output is correct
11 Correct 9 ms 5980 KB Output is correct

Subtask #5
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 2 ms 5724 KB Output is correct
3 Correct 3 ms 5980 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5720 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 12 ms 5988 KB Output is correct
8 Correct 15 ms 5980 KB Output is correct
9 Correct 7 ms 5984 KB Output is correct
10 Correct 9 ms 5988 KB Output is correct
11 Correct 9 ms 5980 KB Output is correct
12 Execution timed out 1084 ms 12880 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #6
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 2 ms 5724 KB Output is correct
3 Correct 3 ms 5980 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5720 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 12 ms 5988 KB Output is correct
8 Correct 15 ms 5980 KB Output is correct
9 Correct 7 ms 5984 KB Output is correct
10 Correct 9 ms 5988 KB Output is correct
11 Correct 9 ms 5980 KB Output is correct
12 Correct 2 ms 5720 KB Output is correct
13 Incorrect 8 ms 5980 KB Output isn't correct
14 Halted 0 ms 0 KB -

Subtask #7
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Correct 2 ms 5724 KB Output is correct
3 Correct 3 ms 5980 KB Output is correct
4 Correct 2 ms 5724 KB Output is correct
5 Correct 2 ms 5720 KB Output is correct
6 Correct 2 ms 5724 KB Output is correct
7 Correct 12 ms 5988 KB Output is correct
8 Correct 15 ms 5980 KB Output is correct
9 Correct 7 ms 5984 KB Output is correct
10 Correct 9 ms 5988 KB Output is correct
11 Correct 9 ms 5980 KB Output is correct
12 Execution timed out 1084 ms 12880 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #8
0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB Output is correct
2 Incorrect 8 ms 5980 KB Output isn't correct
3 Halted 0 ms 0 KB -