oj.uz

답안 #952864

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
952864 2024-03-25T03:39:55 Z GrindMachine Spring cleaning (CEOI20_cleaning) C++17
34 / 100
 1000 ms 44004 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];

struct lca_algo {
    // LCA template (for graphs with 1-based indexing)
 
    int LOG = 1;
    vector<int> depth;
    vector<vector<int>> up;
    vector<int> tin, tout;
    int timer = 1;
 
    lca_algo() {
 
    }
 
    lca_algo(int n, int r) {
        lca_init(n,r);
    }
 
    void lca_init(int n, int r) {
        while ((1 << LOG) < n) LOG++;
        up = vector<vector<int>>(n + 1, vector<int>(LOG, r));
        depth = vector<int>(n + 1);
        tin = vector<int>(n + 1);
        tout = vector<int>(n + 1);
 
        lca_dfs(r, -1);
    }
 
    void lca_dfs(int node, int par) {
        tin[node] = timer++;
 
        trav(child, adj[node]) {
            if (child == par) conts;
 
            up[child][0] = node;
            rep1(j, LOG - 1) {
                up[child][j] = up[up[child][j - 1]][j - 1];
            }
 
            depth[child] = depth[node] + 1;
 
            lca_dfs(child, node);
        }
 
        tout[node] = timer-1;
    }
 
    int lift(int u, int k) {
        rep(j, LOG) {
            if (k & (1 << j)) {
                u = up[u][j];
            }
        }
 
        return u;
    }

    int query(int u, int v) {
        if (depth[u] < depth[v]) swap(u, v);
        int k = depth[u] - depth[v];
        u = lift(u, k);
 
        if (u == v) return u;
 
        rev(j, LOG - 1, 0) {
            if (up[u][j] != up[v][j]) {
                u = up[u][j];
                v = up[v][j];
            }
        }
 
        u = up[u][0];
        return u;
    }
 
    int get_dis(int u, int v) {
        int lca = query(u, v);
        return depth[u] + depth[v] - 2 * depth[lca];
    }
 
    bool is_ances(int u, int v){
        return tin[u] <= tin[v] and tout[u] >= tout[v];
    }
};

vector<ll> depth(N);
vector<ll> leaves(N);
vector<ll> dp(N);
vector<ll> single(N);
vector<bool> leaf(N);
vector<ll> leaf_sum(N);

void dfs1(ll u, ll p){
    leaves[u] = 0;
 
    ll children = 0;
 
    trav(v,adj[u]){
        if(v == p) conts;
        depth[v] = depth[u]+1;
        dfs1(v,u);
        children++;
    }
 
    if(!children){
        leaves[u] = leaf[u] = leaf_sum[u] = single[u] = 1;
        return;
    }
 
    trav(v,adj[u]){
        if(v == p) conts;
        leaves[u] += leaves[v];
    }
    
    leaf_sum[u] = leaves[u];

    if(leaves[u]){
        if(leaves[u]&1){
            dp[u] = depth[u]*(leaves[u]>>1);
            single[u] = (leaves[u] == 1);
            leaves[u] = 1;
        }
        else{
            dp[u] = depth[u]*((leaves[u]-2)>>1);
            leaves[u] = 2;
        }
    }
}

ll parity_sum[N][3][3];

void dfs2(ll u, ll p){
    if(p != -1){
        parity_sum[u][leaves[u]][leaves[p]] = depth[p];
        rep1(j,2){
            rep1(k,2){
                parity_sum[u][j][k] += parity_sum[p][j][k];
            }
        }
    }

    trav(v,adj[u]){
        if(v == p) conts;
        dfs2(v,u);
    }
}

vector<ll> adj2[N];

void solve(int test_case)
{
    ll n,q; cin >> n >> q;
    rep1(i,n-1){
        ll u,v; cin >> u >> v;
        adj[u].pb(v), adj[v].pb(u);
    }
 
    ll root = -1;
    rep1(i,n){
        if(sz(adj[i]) >= 2){
            root = i;
        }
    }

    dfs1(root,-1);
    dfs2(root,-1);
    lca_algo LCA(n,root);

    ll depth_sum = 0;
    rep1(i,n) depth_sum += depth[i]*leaf[i];

    ll leaf_cnt = 0;
    rep1(i,n) leaf_cnt += leaf[i];

    ll sub = 0;
    rep1(i,n) sub += dp[i];

    debug(root);

    while(q--){
        ll k; cin >> k;
        vector<pll> b(k);
        ll curr_depth_sum = depth_sum;
        ll curr_leaf_cnt = leaf_cnt;
        ll curr_sub = sub;
        vector<ll> curr_leaves(n+5);
        rep1(i,n){
            curr_leaves[i] = leaf_sum[i];
        }

        auto is_leaf = leaf;

        rep(i,k){
            ll u; cin >> u;
            b[i] = {LCA.tin[u],u};
            curr_leaf_cnt++;
            curr_depth_sum += depth[u]+1;
            if(is_leaf[u]){
                is_leaf[u] = 0;
                curr_leaves[u] = 0;
                curr_leaf_cnt--;
                curr_depth_sum -= depth[u];
            }
            curr_leaves[u]++;
        }

        sort(all(b));
        rep(i,k-1){
            ll u = b[i].ss, v = b[i+1].ss;
            ll lca = LCA.query(u,v);
            b.pb({LCA.tin[lca],lca});
        }
        b.pb({LCA.tin[root],root});

        sort(all(b));
        b.resize(unique(all(b))-b.begin());
        ll siz = sz(b);
        vector<ll> par(siz);

        stack<ll> stk;
        rep(i,siz){
            ll u = b[i].ss;
            while(!stk.empty() and !LCA.is_ances(stk.top(),u)){
                stk.pop();
            }

            if(i){
                par[i] = stk.top();
                adj2[par[i]].pb(u);
            }

            stk.push(u);
        }

        rev(i,siz-1,0){
            ll u = b[i].ss, p = par[i];
            trav(v,adj2[u]){
                if(curr_leaves[v] != leaves[v]){
                    ll just_below = LCA.lift(v,depth[v]-depth[u]-1);
                    curr_leaves[u] -= leaves[just_below];
                    curr_leaves[u] += 3^leaves[just_below]; 
                }
            }

            curr_sub -= dp[u];

            if(curr_leaves[u]&1){
                curr_sub += depth[u]*(curr_leaves[u]>>1);
                curr_leaves[u] = 1;
            }
            else{
                curr_sub += depth[u]*((curr_leaves[u]-2)>>1);
                curr_leaves[u] = 2;
            }

            if(i and leaves[u] != curr_leaves[u]){
                ll p = par[i];
                ll just_below = LCA.lift(u,depth[u]-depth[p]-1);
                ll sum1 = parity_sum[u][1][2]-parity_sum[just_below][1][2];
                ll sum2 = parity_sum[u][2][1]-parity_sum[just_below][2][1];
                curr_sub += sum1-sum2;
            }

            // ll even_sum = parity_sum[u][0]-parity_sum[p][0];
            // ll odd_sum = parity_sum[u][1]-parity_sum[p][1];
            // ll curr_single_sum = single_sum[u]-single_sum[p];

            // curr_sub += even_sum*ceil2(val[u],2);
            // curr_sub += odd_sum*(val[u]/2);
            // if(val[u] >= 1){
            //     curr_sub -= curr_single_sum;
            // }
        }

        debug(curr_depth_sum);

        ll ans = curr_depth_sum-curr_sub*2;
        if(curr_leaf_cnt&1) ans = -1;
        cout << ans << endl;

        for(auto [ti,u] : b){
            // val[u] = -leaf[u];
            adj2[u].clear();
        }
    }
}
 
int main()
{
    fastio;
 
    int t = 1;
    // cin >> t;
 
    rep1(i, t) {
        solve(i);
    }
 
    return 0;
}

Compilation message

cleaning.cpp: In function 'void dfs1(ll, ll)':
cleaning.cpp:166:43: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
  166 |         leaves[u] = leaf[u] = leaf_sum[u] = single[u] = 1;
cleaning.cpp: In function 'void solve(int)':
cleaning.cpp:46:18: warning: statement has no effect [-Wunused-value]
   46 | #define debug(x) 42
      |                  ^~
cleaning.cpp:238:5: note: in expansion of macro 'debug'
  238 |     debug(root);
      |     ^~~~~
cleaning.cpp:296:29: warning: unused variable 'p' [-Wunused-variable]
  296 |             ll u = b[i].ss, p = par[i];
      |                             ^
cleaning.cpp:46:18: warning: statement has no effect [-Wunused-value]
   46 | #define debug(x) 42
      |                  ^~
cleaning.cpp:335:9: note: in expansion of macro 'debug'
  335 |         debug(curr_depth_sum);
      |         ^~~~~

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 11872 KB Output is correct
2 Correct 134 ms 16420 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 15412 KB Output is correct
2 Correct 21 ms 15480 KB Output is correct
3 Correct 61 ms 33224 KB Output is correct
4 Correct 73 ms 32468 KB Output is correct
5 Correct 88 ms 37700 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 31 ms 16732 KB Output is correct
2 Correct 31 ms 16236 KB Output is correct
3 Correct 61 ms 40272 KB Output is correct
4 Correct 93 ms 44004 KB Output is correct
5 Correct 58 ms 37964 KB Output is correct

Subtask #4
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 49 ms 16780 KB Output is correct
2 Correct 33 ms 15784 KB Output is correct
3 Correct 17 ms 15448 KB Output is correct
4 Correct 19 ms 15804 KB Output is correct
5 Correct 20 ms 16060 KB Output is correct
6 Correct 42 ms 16564 KB Output is correct

Subtask #5
0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1016 ms 26572 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1051 ms 33588 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 11872 KB Output is correct
2 Correct 134 ms 16420 KB Output is correct
3 Correct 22 ms 15412 KB Output is correct
4 Correct 21 ms 15480 KB Output is correct
5 Correct 61 ms 33224 KB Output is correct
6 Correct 73 ms 32468 KB Output is correct
7 Correct 88 ms 37700 KB Output is correct
8 Correct 31 ms 16732 KB Output is correct
9 Correct 31 ms 16236 KB Output is correct
10 Correct 61 ms 40272 KB Output is correct
11 Correct 93 ms 44004 KB Output is correct
12 Correct 58 ms 37964 KB Output is correct
13 Correct 49 ms 16780 KB Output is correct
14 Correct 33 ms 15784 KB Output is correct
15 Correct 17 ms 15448 KB Output is correct
16 Correct 19 ms 15804 KB Output is correct
17 Correct 20 ms 16060 KB Output is correct
18 Correct 42 ms 16564 KB Output is correct
19 Execution timed out 1016 ms 26572 KB Time limit exceeded
20 Halted 0 ms 0 KB -