oj.uz

답안 #223970

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
223970 2020-04-16T23:01:27 Z osaaateiasavtnl Designated Cities (JOI19_designated_cities) C++14
23 / 100
 2000 ms 52752 KB 
#include<bits/stdc++.h>
using namespace std;
 
#define ii pair <int, int>
#define app push_back
#define all(a) a.begin(), a.end()
#define bp __builtin_popcount
#define ll long long
#define mp make_pair
#define f first
#define s second
#define Time (double)clock()/CLOCKS_PER_SEC
 
const int LG = 20, N = 2e5 + 7;
const ll INF = 1e18;
vector <ii> g[N];
int n;
bool used[N], centr[N];
 
int cnt[N];
void calc(int u, int p) {
    cnt[u] = 1;
    used[u] = 1;
    for (auto e : g[u]) {
        int v = e.f, c = e.s;
        if (v != p && !centr[v]) {
            calc(v, u);
            cnt[u] += cnt[v];
        }   
    }   
}   
int get(int u, int p, int all) {
    int mx = -1;
    for (auto e : g[u]) {
        int v = e.f;
        if (v != p && !centr[v]) {
            if (mx == -1 || cnt[mx] < cnt[v])
                mx = v;
        }   
    }   
    if (mx == -1 || cnt[mx] * 2 <= all)
        return u;
    else
        return get(mx, u, all);
}   
ll out[N], sum[N];
void calc_sum(int u, int p) {
    sum[u] = 0;
    for (auto e : g[u]) {
        int v = e.f, c = e.s;
        if (v != p && !centr[v]) {
            calc_sum(v, u);
            sum[u] += sum[v] + c;
        }   
    }   
}   
void add_out(int u, int p, ll x) {
    out[u] += x;
    for (auto e : g[u]) {
        int v = e.f, c = e.s;
        if (v != p && !centr[v]) {
            add_out(v, u, x);
        }   
    }   
}
 
vector <ii> tree[N];
void build(int u, int p) {  
    tree[u].clear();
    for (auto e : g[u]) {
        int v = e.f, c = e.s;
        if (v != p && !centr[v]) {
            tree[u].app(mp(v, c));
            build(v, u);
        }       
    }   
}
int to[N];
ll h[N];
void ladder(int u, ll cur, ll &sum) {
    h[u] = cur;
    to[u] = -1;
    for (auto e : tree[u]) {
        ladder(e.f, cur + e.s, sum);
        sum += e.s;
        h[u] = max(h[u], h[e.f]);
        if (to[u] == -1 || h[to[u]] < h[e.f])
            to[u] = e.f;
    }   
}   
void print(int u, int ded, ll cur, vector <pair <ll, int> > &a, bool root) {
    if (tree[u].empty())
        a.app(mp(cur, ded));
    else
        a.app(mp(0, ded));
                    
    for (auto e : tree[u]) {
        int d = ded;
        if (root) 
            d = e.f;
 
        ll c = cur;
        if (to[u] != e.f)
            c = 0;
        c += e.s;            
 
        print(e.f, d, c, a, 0);
    }   
}   
 
ll ans[N];
void solve(int c) {    
    build(c, c);
    ll sum = 0;
    ladder(c, 0, sum);
    vector <pair <ll, int> > a;
    print(c, c, 0, a, 1);
    sort(all(a)); reverse(all(a));
 
    ans[1] = min(ans[1], out[c] + sum);
 
    int l = -1;
    for (int i = 1; i < a.size(); ++i) {
        if (a[i].s != a[0].s) {
            l = i;
            break;
        }   
    }   
    sum -= a[0].f;
    for (int i = 1; i < a.size(); ++i) {
        sum -= a[i].f;
        if (l <= i) {
            ans[i + 1] = min(ans[i + 1], out[c] + sum);
        }       
        else {
            ans[i + 1] = min(ans[i + 1], out[c] + sum + a[i].f - a[l].f);
        }   
    }   
}
 
signed main() {
    #ifdef HOME
    freopen("input.txt", "r", stdin);
    #else
    #define endl '\n'
    ios_base::sync_with_stdio(0); cin.tie(0);
    #endif
    cin >> n;
    for (int i = 0; i < n - 1; ++i) {
        int u, v, a, b;
        cin >> u >> v >> a >> b;
        g[u].app(mp(v, a));
        g[v].app(mp(u, b));
    }   
    for (int i = 0; i < N; ++i)
        ans[i] = INF;
             
    for (int t = 0; t < LG; ++t) {
        memset(used, 0, sizeof used);
        for (int i = 1; i <= n; ++i) {
            if (!used[i] && !centr[i]) {
 
                calc(i, i);
                int c = get(i, i, cnt[i]);
                solve(c);
                calc_sum(c, c);
                for (auto e : g[c]) {
                    int v = e.f, cost = e.s;
                    if (!centr[v]) {
                        int add = 0;
                        for (auto e : g[v])
                            if (e.f == c)
                                add = e.s;
                        add_out(v, c, sum[c] - sum[v] - cost + add);
                    }   
                }   
                centr[c] = 1;
 
            }   
        }   
    }   
    int q;
    cin >> q;
    while (q--) {
        int k;
        cin >> k;
        cout << ans[k] << endl;
    }   
    
    #ifdef HOME
    cerr << Time << endl;
    #endif
}

Compilation message

designated_cities.cpp: In function 'void calc(int, int)':
designated_cities.cpp:25:22: warning: unused variable 'c' [-Wunused-variable]
         int v = e.f, c = e.s;
                      ^
designated_cities.cpp: In function 'void add_out(int, int, long long int)':
designated_cities.cpp:60:22: warning: unused variable 'c' [-Wunused-variable]
         int v = e.f, c = e.s;
                      ^
designated_cities.cpp: In function 'void solve(int)':
designated_cities.cpp:123:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 1; i < a.size(); ++i) {
                     ~~^~~~~~~~~~
designated_cities.cpp:130:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 1; i < a.size(); ++i) {
                     ~~^~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 11 ms 11520 KB Output is correct
3 Correct 10 ms 11520 KB Output is correct
4 Correct 10 ms 11520 KB Output is correct
5 Correct 12 ms 11520 KB Output is correct
6 Correct 11 ms 11520 KB Output is correct
7 Correct 10 ms 11520 KB Output is correct
8 Correct 11 ms 11520 KB Output is correct
9 Correct 10 ms 11520 KB Output is correct
10 Correct 12 ms 11520 KB Output is correct
11 Correct 10 ms 11520 KB Output is correct

Subtask #2
0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 1434 ms 32920 KB Output is correct
3 Execution timed out 2093 ms 51600 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 1503 ms 32892 KB Output is correct
3 Execution timed out 2086 ms 52752 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 11 ms 11520 KB Output is correct
3 Correct 10 ms 11520 KB Output is correct
4 Correct 10 ms 11520 KB Output is correct
5 Correct 12 ms 11520 KB Output is correct
6 Correct 11 ms 11520 KB Output is correct
7 Correct 10 ms 11520 KB Output is correct
8 Correct 11 ms 11520 KB Output is correct
9 Correct 10 ms 11520 KB Output is correct
10 Correct 12 ms 11520 KB Output is correct
11 Correct 10 ms 11520 KB Output is correct
12 Correct 10 ms 11520 KB Output is correct
13 Correct 15 ms 11776 KB Output is correct
14 Correct 15 ms 11904 KB Output is correct
15 Correct 15 ms 11776 KB Output is correct
16 Correct 15 ms 11776 KB Output is correct
17 Correct 15 ms 11776 KB Output is correct
18 Correct 15 ms 11776 KB Output is correct
19 Correct 15 ms 11776 KB Output is correct
20 Correct 14 ms 11776 KB Output is correct
21 Correct 15 ms 11776 KB Output is correct
22 Correct 15 ms 11776 KB Output is correct
23 Correct 15 ms 11776 KB Output is correct
24 Correct 13 ms 11776 KB Output is correct
25 Correct 16 ms 11904 KB Output is correct
26 Correct 12 ms 11776 KB Output is correct

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 1434 ms 32920 KB Output is correct
3 Execution timed out 2093 ms 51600 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 10 ms 11520 KB Output is correct
2 Correct 11 ms 11520 KB Output is correct
3 Correct 10 ms 11520 KB Output is correct
4 Correct 10 ms 11520 KB Output is correct
5 Correct 12 ms 11520 KB Output is correct
6 Correct 11 ms 11520 KB Output is correct
7 Correct 10 ms 11520 KB Output is correct
8 Correct 11 ms 11520 KB Output is correct
9 Correct 10 ms 11520 KB Output is correct
10 Correct 12 ms 11520 KB Output is correct
11 Correct 10 ms 11520 KB Output is correct
12 Correct 10 ms 11520 KB Output is correct
13 Correct 1434 ms 32920 KB Output is correct
14 Execution timed out 2093 ms 51600 KB Time limit exceeded
15 Halted 0 ms 0 KB -