oj.uz

답안 #105868

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
105868 2019-04-15T11:36:31 Z Alexa2001 Designated Cities (JOI19_designated_cities) C++17
13 / 100
 2000 ms 28816 KB 
#include <bits/stdc++.h>

using namespace std;

const int Nmax = 2e5 + 5;
typedef long long ll;


struct edge
{
    int to, toy, fromy;
};
vector<edge> v[Nmax];

bool used[Nmax];
int t[Nmax];
ll cost[Nmax], act_cost[Nmax], ans[Nmax];
int n;
ll MaxCurr = 0;
int query[Nmax];



ll dfs(int node, int dad = 0)
{
    t[node] = dad;

    ll ans = 0;
    for(auto it : v[node])
        if(it.to != dad)
        {
            cost[it.to] = cost[node] + it.toy;
            ans += it.fromy + dfs(it.to, node);
        }
    return ans;
}

ll get_best(int node, int dad, ll now)
{
    ll best = now;

    for(auto it : v[node])
        if(it.to != dad)
            best = max(best, get_best(it.to, node, now + it.toy - it.fromy));
    return best;
}

void solve0(int root)
{
    cost[root] = 0;
    ll curr = dfs(root);
    MaxCurr = max(MaxCurr, curr);
}

void solve1(int root)
{
    cost[root] = 0;
    ll curr = dfs(root);

    int i, j;
    for(i=1; i<=n; ++i) used[i] = 0, act_cost[i] = cost[i];

    ans[1] = max(ans[1], curr);

    for(i=2; i<=n; ++i)
    {
        int now = 1;
        for(j=1; j<=n; ++j)
            if(!used[j] && act_cost[j] > act_cost[now]) now = j;

        curr += act_cost[now];
        ans[i] = max(ans[i], curr);

        while(now)
        {
            used[now] = 1;
            now = t[now];
        }

        for(j=1; j<=n; ++j)
        {
            int x = j;
            while(!used[x]) x = t[x];
            act_cost[j] = cost[j] - cost[x];
        }
    }
}

int main()
{
//    freopen("input", "r", stdin);
    cin.sync_with_stdio(false);

    ll sum = 0;
    int i;

    cin >> n;
    for(i=1; i<n; ++i)
    {
        int x, y, c1, c2;
        cin >> x >> y >> c1 >> c2;
        v[x].push_back({y, c1, c2});
        v[y].push_back({x, c2, c1});

        sum += c1 + c2;
    }

    int q;
    cin >> q;
    for(i=1; i<=q; ++i) cin >> query[i];

    if(q == 1 && query[1] == 1)
    {
        cout << sum - get_best(1, 0, dfs(1)) << '\n';
        return 0;
    }

    for(i=1; i<=n; ++i) solve1(i);

    for(i=1; i<=q; ++i)
        cout << sum - ans[query[i]] << '\n';

    return 0;
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 6 ms 5120 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 6 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 299 ms 17540 KB Output is correct
3 Correct 350 ms 28380 KB Output is correct
4 Correct 302 ms 17636 KB Output is correct
5 Correct 267 ms 17396 KB Output is correct
6 Correct 344 ms 19320 KB Output is correct
7 Correct 285 ms 17460 KB Output is correct
8 Correct 384 ms 28816 KB Output is correct
9 Correct 225 ms 17896 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 4992 KB Output is correct
2 Execution timed out 2053 ms 23756 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 6 ms 5120 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 6 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 7 ms 4992 KB Output is correct
13 Execution timed out 2051 ms 5260 KB Time limit exceeded
14 Halted 0 ms 0 KB -

Subtask #5
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5120 KB Output is correct
2 Correct 299 ms 17540 KB Output is correct
3 Correct 350 ms 28380 KB Output is correct
4 Correct 302 ms 17636 KB Output is correct
5 Correct 267 ms 17396 KB Output is correct
6 Correct 344 ms 19320 KB Output is correct
7 Correct 285 ms 17460 KB Output is correct
8 Correct 384 ms 28816 KB Output is correct
9 Correct 225 ms 17896 KB Output is correct
10 Correct 6 ms 4992 KB Output is correct
11 Execution timed out 2053 ms 23756 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 5120 KB Output is correct
2 Correct 6 ms 5120 KB Output is correct
3 Correct 6 ms 5120 KB Output is correct
4 Correct 8 ms 4992 KB Output is correct
5 Correct 6 ms 5120 KB Output is correct
6 Correct 8 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 4992 KB Output is correct
9 Correct 6 ms 5120 KB Output is correct
10 Correct 6 ms 5120 KB Output is correct
11 Correct 6 ms 4992 KB Output is correct
12 Correct 6 ms 5120 KB Output is correct
13 Correct 299 ms 17540 KB Output is correct
14 Correct 350 ms 28380 KB Output is correct
15 Correct 302 ms 17636 KB Output is correct
16 Correct 267 ms 17396 KB Output is correct
17 Correct 344 ms 19320 KB Output is correct
18 Correct 285 ms 17460 KB Output is correct
19 Correct 384 ms 28816 KB Output is correct
20 Correct 225 ms 17896 KB Output is correct
21 Correct 6 ms 4992 KB Output is correct
22 Execution timed out 2053 ms 23756 KB Time limit exceeded
23 Halted 0 ms 0 KB -