oj.uz

답안 #945426

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
945426 2024-03-13T19:01:39 Z galen_colin Spring cleaning (CEOI20_cleaning) C++17
100 / 100
 92 ms 38568 KB 
// #pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

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

/* 
find my code templates at https://github.com/galencolin/cp-templates
also maybe subscribe please thanks 
*/

#define send {ios_base::sync_with_stdio(false);}
#define help {cin.tie(NULL);}
#define f first
#define s second
#define getunique(v) {sort(v.begin(), v.end()); v.erase(unique(v.begin(), v.end()), v.end());}

using ll = int;
// using ll = int;
// #pragma warning("int")
//
using vl = vector<ll>;
using pl = pair<ll, ll>;

typedef long double ld;
typedef unsigned long long ull;

#include <ext/pb_ds/assoc_container.hpp> 
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds; 

template <typename num_t>
using ordered_set = tree<num_t, null_type, less<num_t>, rb_tree_tag, tree_order_statistics_node_update>;

// const string PAIR_LEFT = "(";
// const string PAIR_RIGHT = ")";
// const string IT_LEFT = "[";
// const string IT_RIGHT = "]";

const string PAIR_LEFT = "{";
const string PAIR_RIGHT = "}";
const string IT_LEFT = "{";
const string IT_RIGHT = "}";

// benq - print any container + pair
template<typename T, typename = void> struct is_iterable : false_type {};
template<typename T> struct is_iterable<T, void_t<decltype(begin(declval<T>())),decltype(end(declval<T>()))>> : true_type {};
template<typename T> typename enable_if<is_iterable<T>::value&&!is_same<T, string>::value,ostream&>::type operator<<(ostream &cout, T const &v);
template<typename A, typename B> ostream& operator<<(ostream &cout, pair<A, B> const &p) { return cout << PAIR_LEFT << p.f << ", " << p.s << PAIR_RIGHT; }
template<typename T> typename enable_if<is_iterable<T>::value&&!is_same<T, string>::value,ostream&>::type operator<<(ostream &cout, T const &v) {
    cout << IT_LEFT; 
    for (auto it = v.begin(); it != v.end();) {
        cout << *it;
        if (++it != v.end()) cout << ", ";
    }
    return cout << IT_RIGHT;
}
template<typename A, typename B> istream& operator>>(istream& cin, pair<A, B> &p) {
    cin >> p.first;
    return cin >> p.second;
}

template<typename T> void debug(string s, T x) {cerr << "\033[1;34m" << s << "\033[0;32m = \033[35m" << x << "\033[0m\n";}
template<typename T, typename... Args> void debug(string s, T x, Args... args) {for (int i=0, b=0; i<(int)s.size(); i++) if (s[i] == '(' || s[i] == '{') b++; else
        if (s[i] == ')' || s[i] == '}') b--; else if (s[i] == ',' && b == 0) {cerr << "\033[1;34m" << s.substr(0, i) << "\033[0;32m = \033[35m" << x << "\033[31m | "; debug(s.substr(s.find_first_not_of(' ', i + 1)), args...); break;}}
template<typename T> void debug_nameless(T x) {cerr << "\033[35m" << x << "\033[0m\n";}
template<typename T, typename... Args> void debug_nameless(T x, Args... args) {cerr << "\033[35m" << x << "\033[31m | "; debug_nameless(args...);}

#ifdef galen_colin_local
#define pr(...) debug(#__VA_ARGS__, __VA_ARGS__)
#define prs(...) debug_nameless(__VA_ARGS__)
const bool local_ = true;
#else
#define pr(...) 135
#define prs(...) 135
const bool local_ = false;
#endif

mt19937_64 rng(std::chrono::steady_clock::now().time_since_epoch().count());
// mt19937_64 rng(61378913);
/* usage - just do rng() */

void usaco(string filename) {
// #pragma message("be careful, freopen may be wrong")
    freopen((filename + ".in").c_str(), "r", stdin);
    freopen((filename + ".out").c_str(), "w", stdout);
}

// #include <atcoder/all>
// using namespace atcoder;

// const ld pi = 3.14159265358979323846;
// const ll mod = 1000000007;
// const ll mod = 998244353;
// ll mod;



ll n, m, q, k, l, r, x, y, z;
const ll template_array_size = 1e6 + 206171;
ll a[template_array_size];
ll b[template_array_size];
ll c[template_array_size];
string s, t;

vl adj[100005];
vl ch[100005];
ll sz[100005];
ll top[100005];
vl at[100005];
ll lab[100005];
ll par[100005];
ll T = -1;

ll cl[100005];

ll path[100005][30];
ll psz[100005];
ll vis[100005];

ll ps[100005];

ll dsz(ll v, ll p) {
    sz[v] = 1;
    par[v] = p;
    for (ll x: adj[v]) if (x != p) {
        sz[v] += dsz(x, v);
        ch[v].push_back(x);
    }
    return sz[v];
}

void dlab(ll v, ll p) {
    lab[v] = ++T;

    top[v] = v;
    if (p != -1 && lab[p] + 1 == lab[v]) top[v] = top[p];

    for (ll i = 1; i < ch[v].size(); i++) if (sz[ch[v][i]] > sz[ch[v][0]]) swap(ch[v][0], ch[v][i]);

    for (ll x: ch[v]) dlab(x, v);
}

void dl(ll v, ll p) {
    if (ch[v].size() == 0) cl[lab[v]] = 1;

    for (ll x: ch[v]) {
        dl(x, v);
        cl[lab[v]] ^= cl[lab[x]];
    }
}

inline ll gc(ll l, ll r, ll f) {
    ll v = ps[r];
    if (l > 0) v -= ps[l - 1];
    if (!f) v = (r - l + 1) - v;
    return v;
}

inline ll gd(ll l, ll r, ll f) {
    ll v = ps[r];
    if (l > 0) v -= ps[l - 1];
    if (!f) v = (r - l + 1) - v;
    return 2 * v - (r - l + 1);
}

const bool run = local_ ? 0 : 1;
void solve(int tc = 0) {
    cin >> n >> q;

    for (ll i = 1; i < n; i++) {
        cin >> x >> y;
        --x; --y;
        adj[x].push_back(y);
        adj[y].push_back(x);
    }

    ll r = 0;
    while (adj[r].size() == 1) ++r;

    dsz(r, -1);
    dlab(r, -1);
    dl(r, -1);

    for (ll i = 0; i < n; i++) {
        ll t = i;
        while (t != -1) {
            path[i][psz[i]++] = t;
            t = par[top[t]];
        }
    }

    for (ll i = 0; i < n; i++) vis[i] = -1;

    {
        ll r = 0;
        for (ll i = 0; i < n; i++) {
            r += cl[i];
            ps[i] = r;
        }
    }

    for (ll i = 0; i < n; i++) if (i == top[i]) {
        at[lab[i]].reserve(sz[i]);
    }

    for (ll i = 0; i < q; i++) {
        cin >> m;
        vl v(m);
        for (ll &x: v) cin >> x, --x;

        vl nv;
        nv.reserve(m);
        for (ll x: v) {
            if (vis[x] != i && adj[x].size() == 1) {
                vis[x] = i;
                continue;
            }
            nv.push_back(x);
        }
        v = nv;

        sort(v.begin(), v.end(), [&](ll a, ll b) {
            return lab[a] < lab[b];
        });

        nv.clear();
        nv.reserve(m);
        for (ll x: v) {
            if (nv.size() && nv.back() == x) nv.pop_back();
            else nv.push_back(x);
        }
        v = nv;

        for (ll x: v) {
            for (ll i = 0; i < psz[x]; i++) {
                ll y = path[x][i];
                at[lab[top[y]]].push_back(lab[y]);
            }
        }

        ll ans = n + m - 2 + gc(0, n - 1, 0);

        for (ll x: v) {
            for (ll i = 0; i < psz[x]; i++) {
                ll y = path[x][i];
                ll c = lab[top[y]];
                if (at[c].size()) {
                    ll l = 0, r = at[c].size() - 1;

                    ll t = at[c].size() % 2;

                    while (l <= r) {
                        if (at[c][l] <= at[c][r]) {
                            ans += gd(c, at[c][l], t);
                            ++l;
                        } else {
                            ans += gd(c, at[c][r], t);
                            --r;
                        }
                        
                        t ^= 1;
                    }

                    at[c].clear();
                }
            }
        }

        if ((cl[lab[r]] + v.size()) % 2 == 1) {
            cout << -1 << '\n';
        } else {
            cout << ans << '\n';
        }
    }
}

int main() {
    #ifdef galen_colin_local
        auto begin = std::chrono::high_resolution_clock::now();
    #endif
    
    send help

    #ifndef galen_colin_local
        // usaco("cbs");
    #endif
    
    // usaco("cowland");
    
    // freopen("tc.txt", "r", stdin);
    // freopen("tc.txt", "w", stdout);
    // freopen("tc2.cpp", "w", stdout);
    // freopen("in.txt", "r", stdin);
    // freopen("out.txt", "w", stdout);
        
    cout << setprecision(15) << fixed;
    cerr << setprecision(4) << fixed;


            
    int tc = 1;
    // if (local_)
    // if (!run)
    // cin >> tc;
    for (int t = 0; t < tc; t++) {
        pr(t); prs(string(50, '-'));
        solve(t);
        prs(string(50, '-') + "\n");
    }
    
    #ifdef galen_colin_local
        auto end = std::chrono::high_resolution_clock::now();
        cerr << setprecision(4) << fixed;
        cerr << "Execution time: " << std::chrono::duration_cast<std::chrono::duration<double>>(end - begin).count() << " seconds" << endl;
    #endif
}

Compilation message

cleaning.cpp: In function 'void dlab(ll, ll)':
cleaning.cpp:141:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  141 |     for (ll i = 1; i < ch[v].size(); i++) if (sz[ch[v][i]] > sz[ch[v][0]]) swap(ch[v][0], ch[v][i]);
      |                    ~~^~~~~~~~~~~~~~
cleaning.cpp: In function 'int main()':
cleaning.cpp:76:17: warning: statement has no effect [-Wunused-value]
   76 | #define pr(...) 135
      |                 ^~~
cleaning.cpp:309:9: note: in expansion of macro 'pr'
  309 |         pr(t); prs(string(50, '-'));
      |         ^~
cleaning.cpp:77:18: warning: statement has no effect [-Wunused-value]
   77 | #define prs(...) 135
      |                  ^~~
cleaning.cpp:309:16: note: in expansion of macro 'prs'
  309 |         pr(t); prs(string(50, '-'));
      |                ^~~
cleaning.cpp:77:18: warning: statement has no effect [-Wunused-value]
   77 | #define prs(...) 135
      |                  ^~~
cleaning.cpp:311:9: note: in expansion of macro 'prs'
  311 |         prs(string(50, '-') + "\n");
      |         ^~~
cleaning.cpp: In function 'void usaco(std::string)':
cleaning.cpp:87:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   87 |     freopen((filename + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cleaning.cpp:88:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   88 |     freopen((filename + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 32 ms 15548 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 12 ms 11868 KB Output is correct
2 Correct 12 ms 11988 KB Output is correct
3 Correct 31 ms 30084 KB Output is correct
4 Correct 32 ms 26204 KB Output is correct
5 Correct 49 ms 30768 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 14 ms 12632 KB Output is correct
2 Correct 14 ms 12808 KB Output is correct
3 Correct 43 ms 38568 KB Output is correct
4 Correct 50 ms 37972 KB Output is correct
5 Correct 36 ms 37036 KB Output is correct

Subtask #4
16.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 20 ms 16212 KB Output is correct
2 Correct 15 ms 15452 KB Output is correct
3 Correct 13 ms 15452 KB Output is correct
4 Correct 10 ms 15960 KB Output is correct
5 Correct 10 ms 15964 KB Output is correct
6 Correct 16 ms 16048 KB Output is correct

Subtask #5
19.0 / 19.0

# 결과 실행 시간 메모리 Grader output
1 Correct 52 ms 25936 KB Output is correct
2 Correct 49 ms 25944 KB Output is correct
3 Correct 33 ms 18896 KB Output is correct
4 Correct 50 ms 25856 KB Output is correct
5 Correct 50 ms 25948 KB Output is correct

Subtask #6
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 88 ms 30840 KB Output is correct
2 Correct 77 ms 33120 KB Output is correct
3 Correct 85 ms 33424 KB Output is correct
4 Correct 92 ms 32844 KB Output is correct

Subtask #7
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10588 KB Output is correct
2 Correct 32 ms 15548 KB Output is correct
3 Correct 12 ms 11868 KB Output is correct
4 Correct 12 ms 11988 KB Output is correct
5 Correct 31 ms 30084 KB Output is correct
6 Correct 32 ms 26204 KB Output is correct
7 Correct 49 ms 30768 KB Output is correct
8 Correct 14 ms 12632 KB Output is correct
9 Correct 14 ms 12808 KB Output is correct
10 Correct 43 ms 38568 KB Output is correct
11 Correct 50 ms 37972 KB Output is correct
12 Correct 36 ms 37036 KB Output is correct
13 Correct 20 ms 16212 KB Output is correct
14 Correct 15 ms 15452 KB Output is correct
15 Correct 13 ms 15452 KB Output is correct
16 Correct 10 ms 15960 KB Output is correct
17 Correct 10 ms 15964 KB Output is correct
18 Correct 16 ms 16048 KB Output is correct
19 Correct 52 ms 25936 KB Output is correct
20 Correct 49 ms 25944 KB Output is correct
21 Correct 33 ms 18896 KB Output is correct
22 Correct 50 ms 25856 KB Output is correct
23 Correct 50 ms 25948 KB Output is correct
24 Correct 88 ms 30840 KB Output is correct
25 Correct 77 ms 33120 KB Output is correct
26 Correct 85 ms 33424 KB Output is correct
27 Correct 92 ms 32844 KB Output is correct
28 Correct 45 ms 22876 KB Output is correct
29 Correct 59 ms 33420 KB Output is correct
30 Correct 43 ms 30544 KB Output is correct
31 Correct 50 ms 37872 KB Output is correct
32 Correct 51 ms 25936 KB Output is correct
33 Correct 52 ms 31064 KB Output is correct
34 Correct 63 ms 33476 KB Output is correct
35 Correct 65 ms 33372 KB Output is correct