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Submission #1026110

# Submission time Handle Problem Language Result Execution time Memory
1026110 2024-07-17T15:19:16 Z happy_node Inside information (BOI21_servers) C++17
100 / 100
 403 ms 44884 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

const int MX=3e5+5;

int N,K;

char tp[MX];
int A[MX], B[MX];

vector<pair<int,int>> adj[MX], Q[MX];
vector<int> C[MX];

bool vis[MX];
int ans[MX], sz[MX], stk[MX];

struct fenwick {
        int t[MX];

        void upd(int v, int x) {
                for(int i=v;i<MX;i+=i&-i) t[i]+=x;
        }

        int que(int v) {
                int res=0;
                for(int i=v;i>0;i-=i&-i) res+=t[i];
                return res;
        }

        int que(int l, int r) {
                return que(r)-que(l-1);
        }
} ft;

int getSize(int v, int p) {
        sz[v]=1;
        for(auto [u,w]:adj[v]) {
                if(u==p || vis[u]) continue;
                sz[v]+=getSize(u,v);
        }
        return sz[v];
}

int getCen(int v, int p, int s) {
        for(auto [u,w]:adj[v]) {
                if(u==p || vis[u] || 2*sz[u]<=s) continue;
                return getCen(u,v,s);
        }
        return v;
}

void calc(int v, int p, int prv, int head) {
        for(auto [a,id]:Q[v]) {
                if(stk[a]!=-1 && stk[a]<=id) {
                        ans[id]=1;
                }
        }
        for(auto id:C[v]) {
                if(head>id) continue;
                ans[id]+=ft.que(head,id);
        }
        for(auto [u,w]:adj[v]) {
                if(u==p || vis[u]) continue;
                if(prv<w) continue;
                calc(u,v,w,head);
        }
}

void upd(int v, int p, int prv) {
        stk[v]=prv;
        ft.upd(prv,1);
        for(auto [u,w]:adj[v]) {
                if(u==p || vis[u]) continue;
                if(prv>w) continue;
                upd(u,v,w);
        }
}

void rem(int v, int p, int prv) {
        stk[v]=-1;
        ft.upd(prv,-1);
        for(auto [u,w]:adj[v]) {
                if(u==p || vis[u]) continue;
                if(prv>w) continue;
                rem(u,v,w);
        }
}

void cdc(int v, int p) {
        int s=getSize(v,v);
        int cen=getCen(v,v,s);

        vis[cen]=1;

        for(auto [u,w]:adj[cen]) {
                if(vis[u]) continue;
                stk[cen]=w;
                ft.upd(w,1);
                calc(u,cen,w,w);
                upd(u,cen,w);
                ft.upd(w,-1);
        }

        stk[cen]=0;

        for(auto [a,id]:Q[cen]) {
                if(stk[a]!=-1 && stk[a]<=id) {
                        ans[id]=1;
                }
        }

        for(auto id:C[cen]) {
                ans[id]+=ft.que(1,id);
        }

        stk[cen]=-1;

        for(auto [u,w]:adj[cen]) {
                if(vis[u]) continue;
                rem(u,cen,w);
        }

        for(auto [u,w]:adj[cen]) {
                if(vis[u]) continue;
                cdc(u,cen);
        }
}

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

        cin>>N>>K;

        for(int i=0;i<MX;i++) stk[i]=-1;

        for(int i=1;i<N+K;i++) {
                cin>>tp[i]>>A[i];
                if(tp[i]=='S') {
                        cin>>B[i];
                        adj[A[i]].push_back({B[i],i});
                        adj[B[i]].push_back({A[i],i});
                } else if(tp[i]=='Q') {
                        cin>>B[i];
                        // B -> A path increasing
                        Q[B[i]].push_back({A[i],i});
                } else {
                        C[A[i]].push_back(i);
                }
        }

        for(int i=1;i<=N;i++) {
                sort(adj[i].begin(),adj[i].end(),[&](auto x, auto y) {
                        return x.second>y.second;
                });
        }

        cdc(1,0);

        for(int i=1;i<N+K;i++) {
                if(tp[i]=='S') continue;
                if(tp[i]=='Q') {
                        if(ans[i]) cout<<"yes\n";
                        else cout<<"no\n";
                } else {
                        cout<<ans[i]+1<<'\n';
                }
        }
}

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 24 ms 27484 KB Output is correct
2 Correct 32 ms 27988 KB Output is correct
3 Correct 29 ms 28248 KB Output is correct
4 Correct 36 ms 28240 KB Output is correct
5 Correct 30 ms 27872 KB Output is correct
6 Correct 30 ms 27920 KB Output is correct

Subtask #2
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 24 ms 27484 KB Output is correct
2 Correct 32 ms 27988 KB Output is correct
3 Correct 29 ms 28248 KB Output is correct
4 Correct 36 ms 28240 KB Output is correct
5 Correct 30 ms 27872 KB Output is correct
6 Correct 30 ms 27920 KB Output is correct
7 Correct 25 ms 27484 KB Output is correct
8 Correct 33 ms 27740 KB Output is correct
9 Correct 31 ms 27472 KB Output is correct
10 Correct 46 ms 27728 KB Output is correct
11 Correct 34 ms 27472 KB Output is correct
12 Correct 31 ms 27220 KB Output is correct

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 23 ms 27476 KB Output is correct
2 Correct 94 ms 37576 KB Output is correct
3 Correct 84 ms 37568 KB Output is correct

Subtask #4
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 23 ms 27476 KB Output is correct
2 Correct 94 ms 37576 KB Output is correct
3 Correct 84 ms 37568 KB Output is correct
4 Correct 26 ms 27644 KB Output is correct
5 Correct 84 ms 37236 KB Output is correct
6 Correct 66 ms 34832 KB Output is correct
7 Correct 63 ms 35012 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 27472 KB Output is correct
2 Correct 149 ms 44664 KB Output is correct
3 Correct 147 ms 44628 KB Output is correct
4 Correct 131 ms 44368 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 27472 KB Output is correct
2 Correct 149 ms 44664 KB Output is correct
3 Correct 147 ms 44628 KB Output is correct
4 Correct 131 ms 44368 KB Output is correct
5 Correct 29 ms 27476 KB Output is correct
6 Correct 163 ms 44848 KB Output is correct
7 Correct 141 ms 44880 KB Output is correct
8 Correct 143 ms 43864 KB Output is correct
9 Correct 150 ms 43860 KB Output is correct

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 27476 KB Output is correct
2 Correct 128 ms 37876 KB Output is correct
3 Correct 116 ms 37968 KB Output is correct

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 28 ms 27476 KB Output is correct
2 Correct 128 ms 37876 KB Output is correct
3 Correct 116 ms 37968 KB Output is correct
4 Correct 23 ms 27404 KB Output is correct
5 Correct 136 ms 37972 KB Output is correct
6 Correct 124 ms 37972 KB Output is correct

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27472 KB Output is correct
2 Correct 145 ms 44628 KB Output is correct
3 Correct 149 ms 44624 KB Output is correct
4 Correct 131 ms 44368 KB Output is correct
5 Correct 24 ms 27480 KB Output is correct
6 Correct 124 ms 37972 KB Output is correct
7 Correct 138 ms 37972 KB Output is correct
8 Correct 128 ms 38228 KB Output is correct
9 Correct 126 ms 38740 KB Output is correct
10 Correct 169 ms 41900 KB Output is correct
11 Correct 166 ms 40272 KB Output is correct

Subtask #10
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 27472 KB Output is correct
2 Correct 145 ms 44628 KB Output is correct
3 Correct 149 ms 44624 KB Output is correct
4 Correct 131 ms 44368 KB Output is correct
5 Correct 24 ms 27480 KB Output is correct
6 Correct 124 ms 37972 KB Output is correct
7 Correct 138 ms 37972 KB Output is correct
8 Correct 128 ms 38228 KB Output is correct
9 Correct 126 ms 38740 KB Output is correct
10 Correct 169 ms 41900 KB Output is correct
11 Correct 166 ms 40272 KB Output is correct
12 Correct 24 ms 27480 KB Output is correct
13 Correct 148 ms 44628 KB Output is correct
14 Correct 174 ms 44792 KB Output is correct
15 Correct 152 ms 43860 KB Output is correct
16 Correct 153 ms 43968 KB Output is correct
17 Correct 25 ms 27484 KB Output is correct
18 Correct 139 ms 37928 KB Output is correct
19 Correct 138 ms 37716 KB Output is correct
20 Correct 153 ms 38488 KB Output is correct
21 Correct 143 ms 38996 KB Output is correct
22 Correct 184 ms 40276 KB Output is correct
23 Correct 228 ms 41004 KB Output is correct
24 Correct 209 ms 40532 KB Output is correct

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 23 ms 27324 KB Output is correct
2 Correct 32 ms 28164 KB Output is correct
3 Correct 29 ms 28248 KB Output is correct
4 Correct 30 ms 28228 KB Output is correct
5 Correct 31 ms 27968 KB Output is correct
6 Correct 31 ms 27984 KB Output is correct
7 Correct 30 ms 27472 KB Output is correct
8 Correct 99 ms 37484 KB Output is correct
9 Correct 90 ms 37576 KB Output is correct
10 Correct 29 ms 27472 KB Output is correct
11 Correct 150 ms 44584 KB Output is correct
12 Correct 136 ms 44624 KB Output is correct
13 Correct 137 ms 44368 KB Output is correct
14 Correct 21 ms 27480 KB Output is correct
15 Correct 154 ms 37728 KB Output is correct
16 Correct 136 ms 37976 KB Output is correct
17 Correct 146 ms 38224 KB Output is correct
18 Correct 169 ms 38836 KB Output is correct
19 Correct 231 ms 42068 KB Output is correct
20 Correct 179 ms 40276 KB Output is correct
21 Correct 119 ms 37868 KB Output is correct
22 Correct 128 ms 37976 KB Output is correct
23 Correct 147 ms 38112 KB Output is correct
24 Correct 168 ms 38416 KB Output is correct
25 Correct 182 ms 41336 KB Output is correct
26 Correct 140 ms 36768 KB Output is correct
27 Correct 146 ms 36692 KB Output is correct

Subtask #12
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 23 ms 27324 KB Output is correct
2 Correct 32 ms 28164 KB Output is correct
3 Correct 29 ms 28248 KB Output is correct
4 Correct 30 ms 28228 KB Output is correct
5 Correct 31 ms 27968 KB Output is correct
6 Correct 31 ms 27984 KB Output is correct
7 Correct 30 ms 27472 KB Output is correct
8 Correct 99 ms 37484 KB Output is correct
9 Correct 90 ms 37576 KB Output is correct
10 Correct 29 ms 27472 KB Output is correct
11 Correct 150 ms 44584 KB Output is correct
12 Correct 136 ms 44624 KB Output is correct
13 Correct 137 ms 44368 KB Output is correct
14 Correct 21 ms 27480 KB Output is correct
15 Correct 154 ms 37728 KB Output is correct
16 Correct 136 ms 37976 KB Output is correct
17 Correct 146 ms 38224 KB Output is correct
18 Correct 169 ms 38836 KB Output is correct
19 Correct 231 ms 42068 KB Output is correct
20 Correct 179 ms 40276 KB Output is correct
21 Correct 119 ms 37868 KB Output is correct
22 Correct 128 ms 37976 KB Output is correct
23 Correct 147 ms 38112 KB Output is correct
24 Correct 168 ms 38416 KB Output is correct
25 Correct 182 ms 41336 KB Output is correct
26 Correct 140 ms 36768 KB Output is correct
27 Correct 146 ms 36692 KB Output is correct
28 Correct 27 ms 27480 KB Output is correct
29 Correct 41 ms 27676 KB Output is correct
30 Correct 36 ms 27356 KB Output is correct
31 Correct 40 ms 27792 KB Output is correct
32 Correct 41 ms 27396 KB Output is correct
33 Correct 41 ms 27220 KB Output is correct
34 Correct 31 ms 27412 KB Output is correct
35 Correct 112 ms 37220 KB Output is correct
36 Correct 78 ms 34752 KB Output is correct
37 Correct 83 ms 35016 KB Output is correct
38 Correct 25 ms 27412 KB Output is correct
39 Correct 190 ms 44772 KB Output is correct
40 Correct 175 ms 44884 KB Output is correct
41 Correct 181 ms 43884 KB Output is correct
42 Correct 169 ms 43860 KB Output is correct
43 Correct 24 ms 27416 KB Output is correct
44 Correct 192 ms 37900 KB Output is correct
45 Correct 148 ms 37896 KB Output is correct
46 Correct 161 ms 38572 KB Output is correct
47 Correct 189 ms 38928 KB Output is correct
48 Correct 255 ms 40404 KB Output is correct
49 Correct 403 ms 41200 KB Output is correct
50 Correct 245 ms 40516 KB Output is correct
51 Correct 102 ms 36076 KB Output is correct
52 Correct 84 ms 35920 KB Output is correct
53 Correct 118 ms 35372 KB Output is correct
54 Correct 87 ms 36004 KB Output is correct
55 Correct 88 ms 35840 KB Output is correct
56 Correct 162 ms 37420 KB Output is correct
57 Correct 167 ms 39112 KB Output is correct
58 Correct 288 ms 37144 KB Output is correct
59 Correct 185 ms 36920 KB Output is correct