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답안 #725864

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
725864 2023-04-18T08:02:26 Z MohammadAghil Worst Reporter 4 (JOI21_worst_reporter4) C++17
79 / 100
 649 ms 49084 KB 
#include <bits/stdc++.h>
using namespace std;
#define rep(i,l,r) for(int i = (l); i < (r); i++)
#define per(i,r,l) for(int i = (r); i >= (l); i--)
#define all(x) begin(x), end(x)
#define sz(x) (int)size(x)
#define pb push_back
#define ff first
#define ss second
typedef long long ll;
typedef pair<int, int> pp;

void dbg(){
     cerr << endl;
}
template<typename H, typename... T> void dbg(H h, T... t){
     cerr << h << ", ";
     dbg(t...);
}

void IOS(){
     cin.tie(0) -> sync_with_stdio(0);
     #ifndef ONLINE_JUDGE
          // freopen("inp.txt", "r", stdin);
          // freopen("out.txt", "w", stdout);
          #define er(...) cerr << __LINE__ << " <" << #__VA_ARGS__ << ">: ", dbg(__VA_ARGS__)
     #else
          #define er(...) 0
     #endif
}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const ll mod = 1e9 + 7, mod2 = 1e9 + 9, maxn = 2e5 + 5, lg = 21, inf = ll(1e9) + 5;

ll pw(ll a, ll b){
     if(b == 0) return 1;
     ll k = pw(a, b>>1);
     return k*k*(b&1ll?a:1);  
}

vector<int> adj[maxn];
ll par[maxn], H[maxn], C[maxn], nxt[maxn];
int h[maxn], cnt[maxn], top[maxn], st[maxn], en[maxn], t, eu[maxn];
ll dp[maxn];
bool vis[maxn], vis2[maxn];
vector<int> srt;
int root[maxn];

void dfs2(int r){
     srt.pb(r);
     vis2[r] = true;
     for(int c: adj[r]) if(!vis2[c]) dfs2(c);
}


int seg[maxn<<2];

int get(int l, int r, int x = 1, int lx = 0, int rx = t){
     if(l <= lx && r >= rx) return seg[x];
     int mid = (lx + rx)>>1;
     int res = -1;
     if(mid < r) res = get(l, r, x<<1|1, mid, rx);
     if(res + 1) return res;
     if(l < mid) return get(l, r, x<<1, lx, mid);
     return -1;
}

void upd(int i, bool act, int x = 1, int lx = 0, int rx = t){
     if(lx + 1 == rx){
          seg[x] = act? i: -1;
          return;
     }
     int mid = (lx + rx)>>1;
     if(i < mid) upd(i, act, x<<1, lx, mid);
     else upd(i, act, x<<1|1, mid, rx);
     seg[x] = max(seg[x<<1], seg[x<<1|1]);
}

ll fen[maxn];
ll getf(int i){
     ll res = 0;
     for(i++; i; i -= i&-i) res += fen[i];
     return res;
}
ll getf(int l, int r){
     return getf(r-1) - getf(l-1);
}
ll getu(int u){
     return getf(st[u], en[u]);
}
void updf(int i, ll k){
     for(i++; i < maxn; i += i&-i) fen[i] += k;
}

void dfs(int r, int p, int rt){
     root[r] = rt;
     par[r] = p;
     cnt[r] = 1;
     for(int c: adj[r]) if(!vis[c] && c - p){
          h[c] = h[r] + 1;
          dfs(c, r, rt);
          cnt[r] += cnt[c];
     }
}

void dfsHLD(int r, int p, int tp){
     eu[t] = r;
     top[r] = tp, st[r] = t++;
     pp bst = {-1, -1};
     for(int c: adj[r]) if(!vis[c] && c - p) bst = max(bst, {cnt[c], c});
     if(bst.ff + 1){
          dfsHLD(bst.ss, r, tp);
          for(int c: adj[r]) if(c - bst.ss && !vis[c] && c - p) dfsHLD(c, r, c);
     }
     en[r] = t;
}

void add(int u){
     dp[u] = getu(u) + C[u];
     ll sm = C[u], cr = u;
     upd(st[u], true);
     u = par[u];
     if(u + 1){
          updf(st[u], sm);
     }
     while(u + 1){
          int x = get(st[top[u]], st[u] + 1);
          if(x + 1){
               x = eu[x];
               if(par[x] + 1) updf(st[par[x]], -sm);
               ll t = getu(x);
               if(t > dp[x]){
                    sm = t - dp[x];
                    upd(st[x], false);
                    u = par[x];
                    if(u + 1) updf(st[u], sm);
               } else break;
          } else u = par[top[u]];
     }
}

int main(){ IOS();  
     int n; cin >> n;
     ll sum = 0;
     rep(i,0,n){
          cin >> nxt[i] >> H[i] >> C[i];
          nxt[i]--;
          sum += C[i];
          adj[i].pb(nxt[i]), adj[nxt[i]].pb(i);
     }
     fill(seg, seg + (maxn<<2), -1);
     rep(i,0,n){
          if(!vis2[i]){
               dfs2(i);
               int a = i, b = i;
               do{
                    a = nxt[a], b = nxt[nxt[b]];
               } while(a - b);
               map<int, vector<int>> is;
               do{
                    vis[a] = true;
                    a = nxt[a];
               } while(a - b);
               do{
                    dfs(a, -1, a);
                    dfsHLD(a, -1, a);
                    is[H[a]].pb(a);
                    a = nxt[a];
               } while(a - b);
               ll sm = 0;
               ll res = 0;
               sort(all(srt), [&](int i, int j){
                    return pp(H[i], h[i]) > pp(H[j], h[j]);
               });
               rep(i,0,sz(srt)){
                    int u = srt[i];
                    ll g = getu(root[u]);
                    sm -= g;
                    add(u);
                    ll v = getu(root[u]);
                    assert(g <= v);
                    sm += v;
                    if(i == sz(srt)-1 || H[u] - H[srt[i+1]]){
                         if(is.count(H[u])){
                              ll t = sm;
                              for(int c: is[H[u]]){
                                   t += C[c];
                              }
                              res = max(res, t);
                         }
                    }
               }
               sum -= max(res, sm);
               srt.clear();
          }
     }
     cout << sum << '\n';
     return 0;
}

Compilation message

worst_reporter2.cpp: In function 'void add(int)':
worst_reporter2.cpp:120:20: warning: unused variable 'cr' [-Wunused-variable]
  120 |      ll sm = C[u], cr = u;
      |                    ^~

Subtask #1
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8276 KB Output is correct
2 Correct 5 ms 8236 KB Output is correct
3 Correct 5 ms 8160 KB Output is correct
4 Correct 5 ms 8160 KB Output is correct
5 Correct 10 ms 8888 KB Output is correct
6 Correct 12 ms 8916 KB Output is correct
7 Correct 14 ms 8892 KB Output is correct
8 Correct 13 ms 8892 KB Output is correct
9 Correct 12 ms 8892 KB Output is correct
10 Correct 11 ms 8916 KB Output is correct
11 Correct 12 ms 8916 KB Output is correct
12 Correct 11 ms 9260 KB Output is correct
13 Correct 12 ms 9276 KB Output is correct
14 Correct 11 ms 9156 KB Output is correct
15 Correct 13 ms 9164 KB Output is correct
16 Correct 11 ms 8908 KB Output is correct
17 Correct 14 ms 8888 KB Output is correct
18 Correct 13 ms 8956 KB Output is correct
19 Correct 13 ms 9044 KB Output is correct
20 Correct 10 ms 9152 KB Output is correct
21 Correct 10 ms 9128 KB Output is correct
22 Correct 8 ms 8916 KB Output is correct
23 Correct 9 ms 8896 KB Output is correct
24 Correct 11 ms 9164 KB Output is correct
25 Correct 13 ms 9172 KB Output is correct
26 Correct 11 ms 9288 KB Output is correct
27 Correct 11 ms 9044 KB Output is correct
28 Correct 10 ms 9172 KB Output is correct
29 Correct 13 ms 9148 KB Output is correct
30 Correct 13 ms 9112 KB Output is correct
31 Correct 10 ms 9044 KB Output is correct

Subtask #2
65.0 / 65.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8276 KB Output is correct
2 Correct 5 ms 8236 KB Output is correct
3 Correct 5 ms 8160 KB Output is correct
4 Correct 5 ms 8160 KB Output is correct
5 Correct 10 ms 8888 KB Output is correct
6 Correct 12 ms 8916 KB Output is correct
7 Correct 14 ms 8892 KB Output is correct
8 Correct 13 ms 8892 KB Output is correct
9 Correct 12 ms 8892 KB Output is correct
10 Correct 11 ms 8916 KB Output is correct
11 Correct 12 ms 8916 KB Output is correct
12 Correct 11 ms 9260 KB Output is correct
13 Correct 12 ms 9276 KB Output is correct
14 Correct 11 ms 9156 KB Output is correct
15 Correct 13 ms 9164 KB Output is correct
16 Correct 11 ms 8908 KB Output is correct
17 Correct 14 ms 8888 KB Output is correct
18 Correct 13 ms 8956 KB Output is correct
19 Correct 13 ms 9044 KB Output is correct
20 Correct 10 ms 9152 KB Output is correct
21 Correct 10 ms 9128 KB Output is correct
22 Correct 8 ms 8916 KB Output is correct
23 Correct 9 ms 8896 KB Output is correct
24 Correct 11 ms 9164 KB Output is correct
25 Correct 13 ms 9172 KB Output is correct
26 Correct 11 ms 9288 KB Output is correct
27 Correct 11 ms 9044 KB Output is correct
28 Correct 10 ms 9172 KB Output is correct
29 Correct 13 ms 9148 KB Output is correct
30 Correct 13 ms 9112 KB Output is correct
31 Correct 10 ms 9044 KB Output is correct
32 Correct 11 ms 8916 KB Output is correct
33 Correct 534 ms 32044 KB Output is correct
34 Correct 578 ms 32068 KB Output is correct
35 Correct 544 ms 32136 KB Output is correct
36 Correct 547 ms 32100 KB Output is correct
37 Correct 504 ms 32024 KB Output is correct
38 Correct 525 ms 32140 KB Output is correct
39 Correct 446 ms 47584 KB Output is correct
40 Correct 460 ms 48056 KB Output is correct
41 Correct 257 ms 48560 KB Output is correct
42 Correct 422 ms 40992 KB Output is correct
43 Correct 394 ms 41024 KB Output is correct
44 Correct 454 ms 33212 KB Output is correct
45 Correct 448 ms 33168 KB Output is correct
46 Correct 291 ms 33208 KB Output is correct
47 Correct 312 ms 40252 KB Output is correct
48 Correct 318 ms 40516 KB Output is correct
49 Correct 252 ms 40484 KB Output is correct
50 Correct 199 ms 31992 KB Output is correct
51 Correct 201 ms 32000 KB Output is correct
52 Correct 290 ms 40892 KB Output is correct
53 Correct 304 ms 40804 KB Output is correct
54 Correct 170 ms 49084 KB Output is correct
55 Correct 284 ms 40012 KB Output is correct
56 Correct 252 ms 43972 KB Output is correct
57 Correct 268 ms 45760 KB Output is correct
58 Correct 252 ms 40676 KB Output is correct
59 Correct 240 ms 40744 KB Output is correct

Subtask #3
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 8276 KB Output is correct
2 Correct 5 ms 8236 KB Output is correct
3 Correct 5 ms 8160 KB Output is correct
4 Correct 5 ms 8160 KB Output is correct
5 Correct 10 ms 8888 KB Output is correct
6 Correct 12 ms 8916 KB Output is correct
7 Correct 14 ms 8892 KB Output is correct
8 Correct 13 ms 8892 KB Output is correct
9 Correct 12 ms 8892 KB Output is correct
10 Correct 11 ms 8916 KB Output is correct
11 Correct 12 ms 8916 KB Output is correct
12 Correct 11 ms 9260 KB Output is correct
13 Correct 12 ms 9276 KB Output is correct
14 Correct 11 ms 9156 KB Output is correct
15 Correct 13 ms 9164 KB Output is correct
16 Correct 11 ms 8908 KB Output is correct
17 Correct 14 ms 8888 KB Output is correct
18 Correct 13 ms 8956 KB Output is correct
19 Correct 13 ms 9044 KB Output is correct
20 Correct 10 ms 9152 KB Output is correct
21 Correct 10 ms 9128 KB Output is correct
22 Correct 8 ms 8916 KB Output is correct
23 Correct 9 ms 8896 KB Output is correct
24 Correct 11 ms 9164 KB Output is correct
25 Correct 13 ms 9172 KB Output is correct
26 Correct 11 ms 9288 KB Output is correct
27 Correct 11 ms 9044 KB Output is correct
28 Correct 10 ms 9172 KB Output is correct
29 Correct 13 ms 9148 KB Output is correct
30 Correct 13 ms 9112 KB Output is correct
31 Correct 10 ms 9044 KB Output is correct
32 Correct 11 ms 8916 KB Output is correct
33 Correct 534 ms 32044 KB Output is correct
34 Correct 578 ms 32068 KB Output is correct
35 Correct 544 ms 32136 KB Output is correct
36 Correct 547 ms 32100 KB Output is correct
37 Correct 504 ms 32024 KB Output is correct
38 Correct 525 ms 32140 KB Output is correct
39 Correct 446 ms 47584 KB Output is correct
40 Correct 460 ms 48056 KB Output is correct
41 Correct 257 ms 48560 KB Output is correct
42 Correct 422 ms 40992 KB Output is correct
43 Correct 394 ms 41024 KB Output is correct
44 Correct 454 ms 33212 KB Output is correct
45 Correct 448 ms 33168 KB Output is correct
46 Correct 291 ms 33208 KB Output is correct
47 Correct 312 ms 40252 KB Output is correct
48 Correct 318 ms 40516 KB Output is correct
49 Correct 252 ms 40484 KB Output is correct
50 Correct 199 ms 31992 KB Output is correct
51 Correct 201 ms 32000 KB Output is correct
52 Correct 290 ms 40892 KB Output is correct
53 Correct 304 ms 40804 KB Output is correct
54 Correct 170 ms 49084 KB Output is correct
55 Correct 284 ms 40012 KB Output is correct
56 Correct 252 ms 43972 KB Output is correct
57 Correct 268 ms 45760 KB Output is correct
58 Correct 252 ms 40676 KB Output is correct
59 Correct 240 ms 40744 KB Output is correct
60 Correct 4 ms 8148 KB Output is correct
61 Correct 7 ms 8276 KB Output is correct
62 Correct 5 ms 8240 KB Output is correct
63 Correct 6 ms 8276 KB Output is correct
64 Incorrect 649 ms 33488 KB Output isn't correct
65 Halted 0 ms 0 KB -