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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#122282#6127. Kawa ExamlamWA 1ms20848kbC++175.4kb2023-07-09 22:24:372023-07-09 22:24:38

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-07-09 22:24:38]
  • 评测
  • 测评结果:WA
  • 用时:1ms
  • 内存:20848kb
  • [2023-07-09 22:24:37]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;

#define task "a"
#define etr "\n"
#define ll long long
#define ld long double
#define pii pair<int,int>
#define pli pair<long long,int>
#define pll pair<long long, long long>
#define fi first
#define se second
#define bg begin
#define pb push_back
#define pf push_front
#define pob pop_back
#define pof pop_front
#define lwb lower_bound
#define upb upper_bound
#define range(x, l, r) x+l, x+1+r
#define all(x) (x).bg(), (x).end()
#define compact(x) x.resize(unique(all(x)) - (x).bg())
#define sq(x) ((x)*(x))

auto start = chrono::high_resolution_clock::now();

void start_timer()
{
    start = chrono::high_resolution_clock::now();
}

ld elapsed()
{
    auto current = chrono::high_resolution_clock::now();
    ld duration = chrono::duration_cast<chrono::nanoseconds>(current - start).count();
    return duration / 1e9;
}
void freop()
{
	freopen(task".inp", "r", stdin);
	freopen(task".out", "w", stdout);
}

const int N=1e5, M=1e5, mod=1e9+7;

int n, m, timer=0, global=0;
pii edge[N+5];
int a[N+5], sz[N+5], root[N+5], et[N+5]; //basic properties
int in[N+5], out[N+5], low[N+5]; //bridge properties
int res[N+5], sub[N+5];
vector<pii> adj[N+5], tree[N+5];
vector<int> cc;
map<int,int> mp[N+5];
multiset<int> vals[N+5];
bool bridge[N+5];

void reset()
{
    for (int i=1; i<=n; i++)
    {
        adj[i].clear();
        tree[i].clear();
        mp[i].clear();
        vals[i].clear();
    }

    cc.clear();
    fill(range(bridge, 1, m), false);
    fill(range(root, 1, n), 0);
    global = 0;
    timer = 0;
}

void dfs_init(int u)
{
    et[++timer] = u;
    sz[u] = 1;
    mp[u][a[u]] = 1;
    vals[u].insert(1);
    for (auto [v,i] : adj[u])
    {
        if (root[v]) continue;
        root[v] = root[u];
        tree[u].pb({v,i});
        dfs_init(v);
        sz[u] += sz[v];

        if (mp[v].size() > mp[u].size())
        {
            swap(mp[u], mp[v]);
            swap(vals[u], vals[v]);
        }

        for (auto [x,y] : mp[v])
        {
            if (mp[u].find(x) == mp[u].end()) mp[u][x] = 0;
            int& val = mp[u][x];
            if (val && vals[u].find(val) != vals[u].end()) vals[u].erase(vals[u].find(val));
            val += y;
            vals[u].insert(val);
        }
    }

    sub[u] = *vals[u].rbegin();

    out[u] = timer;
}

void dfs_bridge(int par, int u)
{
    //cout << par << ' ' << u << "..." << endl;
    in[u] = low[u] = ++timer;

    bool skip = true;
    for (auto [v,i] : adj[u])
    {
        if (v == par && skip)
        {
            skip = false;
            continue;
        }
        if (in[v]) low[u] = min(low[u], in[v]);
        else
        {
            dfs_bridge(u, v);
            low[u] = min(low[u], low[v]);

            if (low[v] == in[v]) bridge[i] = true;
        }
    }
}

void dfs_tree(int u, bool keep, int id) //keep = 0: add lai vao map; keep = 1: khong add lai
{
    map<int,int>& cnt = mp[root[u]];
    multiset<int>& s = vals[root[u]];
    int child=0, tmp = *s.rbegin(), idx;
    for (auto [v,i] : tree[u])
    {
        if (sz[v] > sz[child]) child = v, idx=i;
    }

    for (auto [v,i] : tree[u])
    {
        if (v != child) dfs_tree(v, 0, i);
    }

    if (child) dfs_tree(child, 1, idx);
    for (auto [v,i] : tree[u])
    {
        if (v == child) continue;
        for (int j=in[v]; j<=out[v]; j++)
        {
            s.erase(s.find(cnt[a[et[j]]]));
            s.insert(--cnt[a[et[j]]]);
        }
    }

    s.erase(s.find(cnt[a[u]]));
    s.insert(--cnt[a[u]]);


    if (bridge[id]) res[id] = *s.rbegin() + sub[u] + global - tmp;
    else res[id] = global;

    //cout << u << ' ' << id << ": " << *s.rbegin() << ' ' << tmp << "..." << endl;

    if (keep == 1) return;
    for (auto [v,i] : tree[u])
    {
        if (v == child) continue;
        for (int j=in[v]; j<=out[v]; j++)
        {
            s.erase(s.find(cnt[a[et[j]]]));
            s.insert(++cnt[a[et[j]]]);
        }
    }

    s.erase(s.find(cnt[a[u]]));
    s.insert(++cnt[a[u]]);
}

void debug()
{
    cout << endl;

    for (int i=1; i<=n; i++)
    {
        cout << sub[i] << ' ';
    }
    cout << endl << endl;

    for (int i : cc)
    {
        cout << i << ": " << *vals[i].rbegin() << endl;
        //for (auto [x,y] : mp[i]) cout << x << ' ' << y << endl;
    }
    cout << endl;

    for (int i=1; i<=n; i++)
    {
        cout << et[i] << ' ';
    }
    cout << endl << endl;

    cout << global << "..." << endl;
    cout << endl;
}

void process()
{
	cin >> n >> m;
	for (int i=1; i<=n; i++) cin >> a[i];
	for (int i=1; i<=m; i++)
    {
        int u,v;
        cin >> u >> v;
        edge[i] = {u,v};
        if (u == v) continue;
        adj[u].pb({v,i});
        adj[v].pb({u,i});
    }

    for (int i=1; i<=n; i++)
    {
        if (root[i]) continue;
        cc.pb(i);
        root[i] = i;
        dfs_init(i);
    }

    timer=0;
    for (int i : cc)
    {
        global += *vals[i].rbegin();
        dfs_bridge(i,i);
    }

    //debug();
    for (int i : cc)
    {
        dfs_tree(i, 0, 0);
    }

    for (int i=1; i<=m; i++) cout << (bridge[i] ? res[i] : global) << ' ';
    cout << etr;

    reset();
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	int t=1; cin >> t;
	while (t--) process();

	return 0;
}

詳細信息

Test #1:

score: 0
Wrong Answer
time: 1ms
memory: 20848kb

input:

3
7 5
1 2 1 2 1 2 1
1 2
1 3
2 4
5 6
5 7
3 3
1 2 3
1 2
1 3
2 3
2 3
12345 54321
1 2
1 2
1 1

output:

6 5 5 5 4 
1 1 1 
1 1 1 

result:

wrong answer 1st lines differ - expected: '6 5 5 5 4', found: '6 5 5 5 4 '