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Submission #748227

# Submission time Handle Problem Language Result Execution time Memory
748227 2023-05-25T18:14:30 Z amirhoseinfar1385 Inside information (BOI21_servers) C++17
53 / 100
 189 ms 36452 KB 
#include<bits/stdc++.h>
using namespace std;
const int maxn=120000+10;
struct yal{
    int u,v,w;
    int getad(int fu){
        int ret=(fu^u^v);
        return ret;
    }
};

struct quer{
    char c;
    int u,v,w,res;
    quer(){
        res=0;
    }
};
quer allq[maxn];
yal alled[maxn];
vector<int>adj[maxn];
int high[maxn],lca[20][maxn],n,k,now=0,nowq=0,timea=0,par[maxn],dpinc[maxn],dpdec[maxn],val[maxn];
pair<int,int>stf[maxn];

int root(int chi){
    if(chi==par[chi])
    {
        return chi;
    }
    return par[chi]=root(par[chi]);
}

void con(int u,int v){
    int rootu=root(u),rootv=root(v);
    if(rootu!=rootv){
        par[rootu]=rootv;
    }
}

int isc(int u,int v){
    int rootu=root(u),rootv=root(v);
    //cout<<u<<" "<<v<<" "<<rootu<<" "<<rootv<<"\n";
    if(rootu!=rootv){
        return 0;
    }
    return 1;
}

void dfs(int u,int para=0){
    if(u!=1){
        if(val[u]<val[para]){
            dpinc[u]=dpinc[para]+1;
            dpdec[u]=1;
        }
        else{
            dpinc[u]=1;
            dpdec[u]=dpdec[para]+1;
        }
    }
    timea++;
    stf[u].first=timea;
    lca[0][u]=para;
    for(auto x:adj[u]){
        int v=alled[x].getad(u);
        if(v!=para){
            val[v]=alled[x].w;
            high[v]=high[u]+1;
            dfs(v,u);
        }
    }
    stf[u].second=timea;
}

void callca(){
    for(int i=1;i<20;i++){
        for(int j=1;j<=n;j++){
            lca[i][j]=lca[i-1][lca[i-1][j]];
        }
    }
}

bool zird(int u,int v){
    if(stf[v].first<=stf[u].first&&stf[v].second>=stf[u].second){
        return 1;
    }
    return 0;
}

void solve(int ind){
    int u=allq[ind].u,v=allq[ind].v;
    if(zird(u,v)){
        int di=high[u]-high[v];
        if(dpdec[u]>=di){
            return ;
        }
        else{
            allq[ind].res=0;
            return ;
        }
    }
    if(zird(v,u)){
        int di=high[v]-high[u];
        if(dpinc[v]>=di){
            return ;
        }
        else{
            allq[ind].res=0;
            return ;
        }
    }
    int fu=u,fv=v;
    for(int i=19;i>=0;i--){
        if(lca[i][u]!=0&&!zird(v,lca[i][u])){
            u=lca[i][u];
        }   
    }
    u=lca[0][u];
    int di=high[fv]-high[u];
    if(dpinc[fv]<di){
        allq[ind].res=0;
        return ;
    }
    di=high[fu]-high[u];
    if(dpdec[fu]<di){
        allq[ind].res=0;
        return ;
    }
    if(stf[fv].first>stf[fu].first){
        allq[ind].res=0;
    }
};


int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    for(int i=1;i<maxn;i++){
        par[i]=i;
    }
    cin>>n>>k;
    for(int i=0;i<n+k-1;i++){
        char c;
        cin>>c;
        if(c=='S'){
            now++;
            cin>>alled[now].u>>alled[now].v;
            alled[now].w=now;
            adj[alled[now].u].push_back(now);
            adj[alled[now].v].push_back(now);
            con(alled[now].u,alled[now].v);
            continue;
        }
        if(c=='Q'){
            nowq++;
            allq[nowq].c=c;
            cin>>allq[nowq].u>>allq[nowq].v;
            allq[nowq].w=now;
            allq[nowq].res=isc(allq[nowq].u,allq[nowq].v);
            continue;
        }
        return 0;
        nowq++;
        allq[nowq].c=c;
        cin>>allq[nowq].u;
        allq[nowq].w=now;
    }
    dfs(1);
    callca();
    for(int i=1;i<=nowq;i++){
        if(allq[i].c=='Q'){
            solve(i); 
            if(allq[i].res==1){
                cout<<"yes\n";
            }
            else{
                cout<<"no\n";
            }
        }
    }
}

Subtask #1
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7252 KB Output is correct
2 Correct 36 ms 8372 KB Output is correct
3 Correct 37 ms 8544 KB Output is correct
4 Correct 40 ms 8468 KB Output is correct
5 Correct 27 ms 8652 KB Output is correct
6 Correct 33 ms 8388 KB Output is correct

Subtask #2
0.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7252 KB Output is correct
2 Correct 36 ms 8372 KB Output is correct
3 Correct 37 ms 8544 KB Output is correct
4 Correct 40 ms 8468 KB Output is correct
5 Correct 27 ms 8652 KB Output is correct
6 Correct 33 ms 8388 KB Output is correct
7 Partially correct 3 ms 5992 KB Output is incorrect
8 Partially correct 3 ms 5984 KB Output is incorrect
9 Partially correct 4 ms 6100 KB Output is incorrect
10 Partially correct 3 ms 5972 KB Output is incorrect
11 Partially correct 3 ms 5972 KB Output is incorrect
12 Partially correct 3 ms 5988 KB Output is incorrect

Subtask #3
2.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 26 ms 7360 KB Output is correct
2 Correct 108 ms 26948 KB Output is correct
3 Correct 112 ms 27040 KB Output is correct

Subtask #4
0.5 / 2.5

# Verdict Execution time Memory Grader output
1 Correct 26 ms 7360 KB Output is correct
2 Correct 108 ms 26948 KB Output is correct
3 Correct 112 ms 27040 KB Output is correct
4 Partially correct 4 ms 5972 KB Output is incorrect
5 Partially correct 3 ms 5972 KB Output is incorrect
6 Partially correct 3 ms 6020 KB Output is incorrect
7 Partially correct 3 ms 5972 KB Output is incorrect

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 7316 KB Output is correct
2 Correct 113 ms 36436 KB Output is correct
3 Correct 118 ms 36448 KB Output is correct
4 Correct 75 ms 36380 KB Output is correct

Subtask #6
0.5 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 23 ms 7316 KB Output is correct
2 Correct 113 ms 36436 KB Output is correct
3 Correct 118 ms 36448 KB Output is correct
4 Correct 75 ms 36380 KB Output is correct
5 Partially correct 4 ms 5972 KB Output is incorrect
6 Partially correct 3 ms 5988 KB Output is incorrect
7 Partially correct 3 ms 5972 KB Output is incorrect
8 Partially correct 3 ms 5972 KB Output is incorrect
9 Partially correct 3 ms 5972 KB Output is incorrect

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7304 KB Output is correct
2 Correct 107 ms 27060 KB Output is correct
3 Correct 138 ms 26932 KB Output is correct

Subtask #8
0.5 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7304 KB Output is correct
2 Correct 107 ms 27060 KB Output is correct
3 Correct 138 ms 26932 KB Output is correct
4 Partially correct 3 ms 5972 KB Output is incorrect
5 Partially correct 3 ms 5972 KB Output is incorrect
6 Partially correct 30 ms 10192 KB Output is incorrect

Subtask #9
12.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7236 KB Output is correct
2 Correct 111 ms 36372 KB Output is correct
3 Correct 104 ms 36452 KB Output is correct
4 Correct 75 ms 36368 KB Output is correct
5 Correct 25 ms 7236 KB Output is correct
6 Correct 100 ms 27104 KB Output is correct
7 Correct 120 ms 26960 KB Output is correct
8 Correct 146 ms 27596 KB Output is correct
9 Correct 141 ms 27536 KB Output is correct
10 Correct 133 ms 30580 KB Output is correct
11 Correct 169 ms 29828 KB Output is correct

Subtask #10
0.5 / 12.5

# Verdict Execution time Memory Grader output
1 Correct 25 ms 7236 KB Output is correct
2 Correct 111 ms 36372 KB Output is correct
3 Correct 104 ms 36452 KB Output is correct
4 Correct 75 ms 36368 KB Output is correct
5 Correct 25 ms 7236 KB Output is correct
6 Correct 100 ms 27104 KB Output is correct
7 Correct 120 ms 26960 KB Output is correct
8 Correct 146 ms 27596 KB Output is correct
9 Correct 141 ms 27536 KB Output is correct
10 Correct 133 ms 30580 KB Output is correct
11 Correct 169 ms 29828 KB Output is correct
12 Partially correct 3 ms 5972 KB Output is incorrect
13 Partially correct 3 ms 5864 KB Output is incorrect
14 Partially correct 3 ms 5972 KB Output is incorrect
15 Partially correct 3 ms 5972 KB Output is incorrect
16 Partially correct 3 ms 5972 KB Output is incorrect
17 Partially correct 3 ms 5972 KB Output is incorrect
18 Partially correct 3 ms 5972 KB Output is incorrect
19 Partially correct 33 ms 9944 KB Output is incorrect
20 Partially correct 3 ms 5976 KB Output is incorrect
21 Partially correct 3 ms 5972 KB Output is incorrect
22 Partially correct 3 ms 5976 KB Output is incorrect
23 Partially correct 35 ms 10468 KB Output is incorrect
24 Partially correct 43 ms 11312 KB Output is incorrect

Subtask #11
17.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 26 ms 7224 KB Output is correct
2 Correct 39 ms 8336 KB Output is correct
3 Correct 35 ms 8448 KB Output is correct
4 Correct 42 ms 8396 KB Output is correct
5 Correct 29 ms 8660 KB Output is correct
6 Correct 32 ms 8428 KB Output is correct
7 Correct 24 ms 7364 KB Output is correct
8 Correct 110 ms 26948 KB Output is correct
9 Correct 110 ms 26948 KB Output is correct
10 Correct 23 ms 7248 KB Output is correct
11 Correct 105 ms 36428 KB Output is correct
12 Correct 114 ms 36436 KB Output is correct
13 Correct 75 ms 36384 KB Output is correct
14 Correct 25 ms 7244 KB Output is correct
15 Correct 95 ms 26984 KB Output is correct
16 Correct 118 ms 27120 KB Output is correct
17 Correct 151 ms 27512 KB Output is correct
18 Correct 136 ms 27584 KB Output is correct
19 Correct 127 ms 30540 KB Output is correct
20 Correct 185 ms 29840 KB Output is correct
21 Correct 132 ms 27544 KB Output is correct
22 Correct 128 ms 27584 KB Output is correct
23 Correct 153 ms 27572 KB Output is correct
24 Correct 151 ms 27728 KB Output is correct
25 Correct 189 ms 29932 KB Output is correct
26 Correct 120 ms 27292 KB Output is correct
27 Correct 118 ms 27208 KB Output is correct

Subtask #12
0.5 / 17.5

# Verdict Execution time Memory Grader output
1 Correct 26 ms 7224 KB Output is correct
2 Correct 39 ms 8336 KB Output is correct
3 Correct 35 ms 8448 KB Output is correct
4 Correct 42 ms 8396 KB Output is correct
5 Correct 29 ms 8660 KB Output is correct
6 Correct 32 ms 8428 KB Output is correct
7 Correct 24 ms 7364 KB Output is correct
8 Correct 110 ms 26948 KB Output is correct
9 Correct 110 ms 26948 KB Output is correct
10 Correct 23 ms 7248 KB Output is correct
11 Correct 105 ms 36428 KB Output is correct
12 Correct 114 ms 36436 KB Output is correct
13 Correct 75 ms 36384 KB Output is correct
14 Correct 25 ms 7244 KB Output is correct
15 Correct 95 ms 26984 KB Output is correct
16 Correct 118 ms 27120 KB Output is correct
17 Correct 151 ms 27512 KB Output is correct
18 Correct 136 ms 27584 KB Output is correct
19 Correct 127 ms 30540 KB Output is correct
20 Correct 185 ms 29840 KB Output is correct
21 Correct 132 ms 27544 KB Output is correct
22 Correct 128 ms 27584 KB Output is correct
23 Correct 153 ms 27572 KB Output is correct
24 Correct 151 ms 27728 KB Output is correct
25 Correct 189 ms 29932 KB Output is correct
26 Correct 120 ms 27292 KB Output is correct
27 Correct 118 ms 27208 KB Output is correct
28 Partially correct 4 ms 5972 KB Output is incorrect
29 Partially correct 3 ms 5980 KB Output is incorrect
30 Partially correct 3 ms 6100 KB Output is incorrect
31 Partially correct 3 ms 5972 KB Output is incorrect
32 Partially correct 3 ms 5972 KB Output is incorrect
33 Partially correct 3 ms 5972 KB Output is incorrect
34 Partially correct 3 ms 5876 KB Output is incorrect
35 Partially correct 3 ms 5972 KB Output is incorrect
36 Partially correct 3 ms 5972 KB Output is incorrect
37 Partially correct 3 ms 5972 KB Output is incorrect
38 Partially correct 3 ms 5992 KB Output is incorrect
39 Partially correct 3 ms 5972 KB Output is incorrect
40 Partially correct 3 ms 5976 KB Output is incorrect
41 Partially correct 3 ms 5972 KB Output is incorrect
42 Partially correct 3 ms 5972 KB Output is incorrect
43 Partially correct 4 ms 5972 KB Output is incorrect
44 Partially correct 3 ms 5972 KB Output is incorrect
45 Partially correct 27 ms 10020 KB Output is incorrect
46 Partially correct 3 ms 5972 KB Output is incorrect
47 Partially correct 3 ms 5972 KB Output is incorrect
48 Partially correct 3 ms 5972 KB Output is incorrect
49 Partially correct 35 ms 10480 KB Output is incorrect
50 Partially correct 49 ms 11396 KB Output is incorrect
51 Partially correct 3 ms 5972 KB Output is incorrect
52 Partially correct 3 ms 5984 KB Output is incorrect
53 Partially correct 3 ms 5976 KB Output is incorrect
54 Partially correct 4 ms 5972 KB Output is incorrect
55 Partially correct 3 ms 5972 KB Output is incorrect
56 Partially correct 3 ms 5980 KB Output is incorrect
57 Partially correct 3 ms 5972 KB Output is incorrect
58 Partially correct 38 ms 11124 KB Output is incorrect
59 Partially correct 46 ms 13064 KB Output is incorrect