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답안 #418287

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
418287 2021-06-05T09:16:54 Z lyc Worst Reporter 4 (JOI21_worst_reporter4) C++14
100 / 100
 504 ms 119964 KB 
#include <bits/stdc++.h>
using namespace std;

#define TRACE(x) cerr << #x << " :: " << x << endl
#define _ << " " <<
#define SZ(x) (int)(x).size()
#define ALL(x) (x).begin(),(x).end()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for(int i=(a);i>=(b);--i)
typedef long long ll;

const int mxN = 2e5+5;

int N, A[mxN], H[mxN], C[mxN], V;
vector<int> al[mxN], vals, cyc;
int vis[mxN], pa[mxN], onstk[mxN], incyc[mxN];
map<int,ll> dp[mxN];

void dfs(int u) {
    dp[u].insert(make_pair(0,0));
    for (int v : al[u]) {
        dfs(v);

        if (dp[v].count(H[v]+1)) dp[v][H[v]+1] += C[v];
        else dp[v].insert(make_pair(H[v]+1, C[v]));
        
        if (0 < H[v]) {
            if (dp[v].count(0)) dp[v][0] += C[v];
            else dp[v].insert(make_pair(0,C[v]));

            auto it = --dp[v].lower_bound(H[v]+1);
            while (it != dp[v].begin() && it->second <= C[v]) {
                auto x = prev(it);
                x->second += it->second;
                dp[v].erase(it);
                it = x;
            }
            it->second -= C[v];
        }

        if (SZ(dp[v]) > SZ(dp[u])) swap(dp[v],dp[u]);
        for (auto& x : dp[v]) {
            if (dp[u].count(x.first)) dp[u][x.first] += x.second;
            else dp[u].insert(x);
        }
    }
}

void dfs2(int u) {
    vis[u] = 1;
    onstk[u] = 1;
    for (int& v : al[u]) {
        if (!vis[v]) {
            pa[v] = u;
            dfs2(v);
        } else if (onstk[v]) {
            cyc.push_back(v);
            for (int x = u; x != v; x = pa[x]) cyc.push_back(x);
        }
    }
    onstk[u] = 0;
}

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

    cin >> N;
    FOR(i,1,N){
        cin >> A[i] >> H[i] >> C[i];
        al[A[i]].push_back(i);
        vals.push_back(H[i]);
    }


    vals.push_back(1);
    sort(ALL(vals));
    vals.resize(unique(ALL(vals))-vals.begin());
    FOR(i,1,N){
        H[i] = lower_bound(ALL(vals),H[i])-vals.begin();
    }
    V = SZ(vals);


    ll tot = 0;
    memset(vis,0,sizeof vis);
    FOR(i,1,N) if (!vis[i]) {
        cyc.clear();
        dfs2(i);
        if (cyc.empty()) continue;

        sort(ALL(cyc), [](int u, int v){ return H[u] < H[v]; });
        for (int& u : cyc) incyc[u] = 1;

        auto& adj = al[cyc[0]];
        RFOR(j,SZ(adj)-1,0) if (incyc[adj[j]]) {
            adj.erase(adj.begin()+j);
        }
        FOR(j,1,SZ(cyc)-1){
            for (int& v : al[cyc[j]]) if (!incyc[v]) {
                adj.push_back(v);
            }
            al[cyc[j]].clear();
            al[cyc[j]].push_back(cyc[j-1]);
        }

        int root = cyc.back();
        dfs(root);
        ll ans = dp[root][0] + C[root], cur = 0;
        for (auto& x : dp[root]) {
            if (x.first > H[root]) break;
            cur += x.second;
        }
        ans = min(ans, cur);
        //TRACE(ans);
        tot += ans;
    }


    cout << tot << '\n';
}

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 15180 KB Output is correct
2 Correct 10 ms 15180 KB Output is correct
3 Correct 8 ms 15208 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 16 ms 16772 KB Output is correct
6 Correct 15 ms 16376 KB Output is correct
7 Correct 13 ms 16168 KB Output is correct
8 Correct 17 ms 16880 KB Output is correct
9 Correct 15 ms 16332 KB Output is correct
10 Correct 13 ms 16060 KB Output is correct
11 Correct 14 ms 15948 KB Output is correct
12 Correct 14 ms 16792 KB Output is correct
13 Correct 12 ms 16736 KB Output is correct
14 Correct 14 ms 16332 KB Output is correct
15 Correct 14 ms 16292 KB Output is correct
16 Correct 17 ms 17116 KB Output is correct
17 Correct 15 ms 16480 KB Output is correct
18 Correct 12 ms 15960 KB Output is correct
19 Correct 14 ms 16588 KB Output is correct
20 Correct 13 ms 16332 KB Output is correct
21 Correct 12 ms 16332 KB Output is correct
22 Correct 13 ms 16416 KB Output is correct
23 Correct 12 ms 16112 KB Output is correct
24 Correct 14 ms 16604 KB Output is correct
25 Correct 13 ms 16348 KB Output is correct
26 Correct 13 ms 16788 KB Output is correct
27 Correct 15 ms 16604 KB Output is correct
28 Correct 17 ms 16600 KB Output is correct
29 Correct 16 ms 16844 KB Output is correct
30 Correct 15 ms 16728 KB Output is correct
31 Correct 14 ms 16736 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 15180 KB Output is correct
2 Correct 10 ms 15180 KB Output is correct
3 Correct 8 ms 15208 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 16 ms 16772 KB Output is correct
6 Correct 15 ms 16376 KB Output is correct
7 Correct 13 ms 16168 KB Output is correct
8 Correct 17 ms 16880 KB Output is correct
9 Correct 15 ms 16332 KB Output is correct
10 Correct 13 ms 16060 KB Output is correct
11 Correct 14 ms 15948 KB Output is correct
12 Correct 14 ms 16792 KB Output is correct
13 Correct 12 ms 16736 KB Output is correct
14 Correct 14 ms 16332 KB Output is correct
15 Correct 14 ms 16292 KB Output is correct
16 Correct 17 ms 17116 KB Output is correct
17 Correct 15 ms 16480 KB Output is correct
18 Correct 12 ms 15960 KB Output is correct
19 Correct 14 ms 16588 KB Output is correct
20 Correct 13 ms 16332 KB Output is correct
21 Correct 12 ms 16332 KB Output is correct
22 Correct 13 ms 16416 KB Output is correct
23 Correct 12 ms 16112 KB Output is correct
24 Correct 14 ms 16604 KB Output is correct
25 Correct 13 ms 16348 KB Output is correct
26 Correct 13 ms 16788 KB Output is correct
27 Correct 15 ms 16604 KB Output is correct
28 Correct 17 ms 16600 KB Output is correct
29 Correct 16 ms 16844 KB Output is correct
30 Correct 15 ms 16728 KB Output is correct
31 Correct 14 ms 16736 KB Output is correct
32 Correct 16 ms 16736 KB Output is correct
33 Correct 490 ms 95104 KB Output is correct
34 Correct 370 ms 70324 KB Output is correct
35 Correct 504 ms 92084 KB Output is correct
36 Correct 381 ms 70216 KB Output is correct
37 Correct 265 ms 51256 KB Output is correct
38 Correct 233 ms 46648 KB Output is correct
39 Correct 252 ms 78260 KB Output is correct
40 Correct 228 ms 78208 KB Output is correct
41 Correct 166 ms 78176 KB Output is correct
42 Correct 247 ms 61192 KB Output is correct
43 Correct 221 ms 60980 KB Output is correct
44 Correct 490 ms 119964 KB Output is correct
45 Correct 334 ms 84424 KB Output is correct
46 Correct 154 ms 46956 KB Output is correct
47 Correct 360 ms 71020 KB Output is correct
48 Correct 216 ms 64216 KB Output is correct
49 Correct 161 ms 63996 KB Output is correct
50 Correct 325 ms 62380 KB Output is correct
51 Correct 175 ms 49940 KB Output is correct
52 Correct 395 ms 71688 KB Output is correct
53 Correct 201 ms 64572 KB Output is correct
54 Correct 172 ms 78436 KB Output is correct
55 Correct 323 ms 72592 KB Output is correct
56 Correct 302 ms 80056 KB Output is correct
57 Correct 289 ms 83580 KB Output is correct
58 Correct 311 ms 79032 KB Output is correct
59 Correct 322 ms 79008 KB Output is correct

Subtask #3
21.0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 8 ms 15180 KB Output is correct
2 Correct 10 ms 15180 KB Output is correct
3 Correct 8 ms 15208 KB Output is correct
4 Correct 9 ms 15180 KB Output is correct
5 Correct 16 ms 16772 KB Output is correct
6 Correct 15 ms 16376 KB Output is correct
7 Correct 13 ms 16168 KB Output is correct
8 Correct 17 ms 16880 KB Output is correct
9 Correct 15 ms 16332 KB Output is correct
10 Correct 13 ms 16060 KB Output is correct
11 Correct 14 ms 15948 KB Output is correct
12 Correct 14 ms 16792 KB Output is correct
13 Correct 12 ms 16736 KB Output is correct
14 Correct 14 ms 16332 KB Output is correct
15 Correct 14 ms 16292 KB Output is correct
16 Correct 17 ms 17116 KB Output is correct
17 Correct 15 ms 16480 KB Output is correct
18 Correct 12 ms 15960 KB Output is correct
19 Correct 14 ms 16588 KB Output is correct
20 Correct 13 ms 16332 KB Output is correct
21 Correct 12 ms 16332 KB Output is correct
22 Correct 13 ms 16416 KB Output is correct
23 Correct 12 ms 16112 KB Output is correct
24 Correct 14 ms 16604 KB Output is correct
25 Correct 13 ms 16348 KB Output is correct
26 Correct 13 ms 16788 KB Output is correct
27 Correct 15 ms 16604 KB Output is correct
28 Correct 17 ms 16600 KB Output is correct
29 Correct 16 ms 16844 KB Output is correct
30 Correct 15 ms 16728 KB Output is correct
31 Correct 14 ms 16736 KB Output is correct
32 Correct 16 ms 16736 KB Output is correct
33 Correct 490 ms 95104 KB Output is correct
34 Correct 370 ms 70324 KB Output is correct
35 Correct 504 ms 92084 KB Output is correct
36 Correct 381 ms 70216 KB Output is correct
37 Correct 265 ms 51256 KB Output is correct
38 Correct 233 ms 46648 KB Output is correct
39 Correct 252 ms 78260 KB Output is correct
40 Correct 228 ms 78208 KB Output is correct
41 Correct 166 ms 78176 KB Output is correct
42 Correct 247 ms 61192 KB Output is correct
43 Correct 221 ms 60980 KB Output is correct
44 Correct 490 ms 119964 KB Output is correct
45 Correct 334 ms 84424 KB Output is correct
46 Correct 154 ms 46956 KB Output is correct
47 Correct 360 ms 71020 KB Output is correct
48 Correct 216 ms 64216 KB Output is correct
49 Correct 161 ms 63996 KB Output is correct
50 Correct 325 ms 62380 KB Output is correct
51 Correct 175 ms 49940 KB Output is correct
52 Correct 395 ms 71688 KB Output is correct
53 Correct 201 ms 64572 KB Output is correct
54 Correct 172 ms 78436 KB Output is correct
55 Correct 323 ms 72592 KB Output is correct
56 Correct 302 ms 80056 KB Output is correct
57 Correct 289 ms 83580 KB Output is correct
58 Correct 311 ms 79032 KB Output is correct
59 Correct 322 ms 79008 KB Output is correct
60 Correct 8 ms 15192 KB Output is correct
61 Correct 8 ms 15196 KB Output is correct
62 Correct 8 ms 15140 KB Output is correct
63 Correct 8 ms 15180 KB Output is correct
64 Correct 459 ms 80696 KB Output is correct
65 Correct 394 ms 63952 KB Output is correct
66 Correct 473 ms 81300 KB Output is correct
67 Correct 371 ms 63580 KB Output is correct
68 Correct 294 ms 50488 KB Output is correct
69 Correct 253 ms 47024 KB Output is correct
70 Correct 393 ms 68748 KB Output is correct
71 Correct 359 ms 62528 KB Output is correct
72 Correct 395 ms 79756 KB Output is correct
73 Correct 357 ms 79912 KB Output is correct
74 Correct 504 ms 73380 KB Output is correct
75 Correct 343 ms 65720 KB Output is correct
76 Correct 309 ms 65716 KB Output is correct
77 Correct 438 ms 73856 KB Output is correct
78 Correct 288 ms 66100 KB Output is correct
79 Correct 499 ms 88864 KB Output is correct
80 Correct 418 ms 76816 KB Output is correct
81 Correct 328 ms 66104 KB Output is correct
82 Correct 409 ms 80080 KB Output is correct
83 Correct 164 ms 43704 KB Output is correct
84 Correct 502 ms 78060 KB Output is correct
85 Correct 476 ms 78104 KB Output is correct
86 Correct 495 ms 78044 KB Output is correct
87 Correct 473 ms 78004 KB Output is correct
88 Correct 495 ms 78084 KB Output is correct