oj.uz

Submission #799796

# Submission time Handle Problem Language Result Execution time Memory
799796 2023-08-01T03:24:58 Z 1075508020060209tc Unique Cities (JOI19_ho_t5) C++14
4 / 100
 2000 ms 37304 KB 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC targent("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;
//#define int long long

int n;int M;
vector<int>e[200005];
int D;
int rt1;int rt2;
int dph[200005];
int dp[200005];
int fa[200005];

void dpdfs(int nw,int pa){
fa[nw]=pa;
dph[nw]=dph[pa]+1;
dp[nw]=nw;
for(int i=0;i<e[nw].size();i++){
    int v=e[nw][i];
    if(v==pa){continue;}
    dpdfs(v,nw);
    if(dph[dp[v]]>dph[dp[nw]]){
        dp[nw]=dp[v];
    }
}
}

void finrt(){
dpdfs(1,0);
rt1=dp[1];
//cout<<rt1<<" ";
dpdfs(rt1,0);
rt2=dp[rt1];
//cout<<rt2<<endl;
D=dph[rt2];
}

void srtlng(int rt){
dpdfs(rt,0);
for(int nw=1;nw<=n;nw++){
    for(int i=0;i<e[nw].size();i++){
        int v=e[nw][i];
        if(v==fa[nw]){continue;}
        if(e[nw][0]==fa[nw]||dph[dp[v]]>dph[dp[e[nw][0]]]){
            swap(e[nw][i],e[nw][0]);
        }
    }
    for(int i=1;i<e[nw].size();i++){
        int v=e[nw][i];
        if(v==fa[nw]){continue;}
        if(e[nw][1]==fa[nw]||dph[dp[v]]>dph[dp[e[nw][1]]]){
            swap(e[nw][i],e[nw][1]);
        }
    }
}
}
int ar[200005];
int buc[200005];
int bcnt;
void add(int v){
    buc[v]++;
    if(buc[v]==1){bcnt++;}
    //cout<<v<<" "<<bcnt<<endl;
}
void del(int v){
    buc[v]--;
    if(buc[v]==0){bcnt--;}
   // cout<<v<<" "<<bcnt<<endl;
}
stack<int>stk;


int ans[200005];
void dfs(int nw,int pa){
if(e[nw].size()==1&&pa){
    ans[nw]=max(ans[nw],bcnt);
    return;
}
vector<int>rev;
if(1){
    int d=0;
    if(e[nw].size()>=2&&e[nw][1]!=pa){
        d=dph[dp[e[nw][1]]]-dph[nw];
    }
    while(stk.size()&&dph[stk.top()]>=dph[nw]-d){
        rev.push_back(stk.top());
        del(ar[stk.top()]);
        stk.pop();
    }
    stk.push(nw);
    add(ar[nw]);
    dfs(e[nw][0],nw);
    del(ar[nw]);
    stk.pop();
}
int d=dph[dp[e[nw][0]]]-dph[nw];
while(stk.size()&&dph[stk.top()]>=dph[nw]-d){
    rev.push_back(stk.top());
    del(ar[stk.top()]);
    stk.pop();
}
ans[nw]=max(ans[nw],bcnt);
add(ar[nw]);
stk.push(nw);
for(int i=1;i<e[nw].size();i++){
    int v=e[nw][i];
    if(v==pa){continue;}
    dfs(v,nw);
}
del(ar[nw]);
stk.pop();
while(rev.size()){
    add(ar[rev.back()]);
    stk.push(rev.back());
    rev.pop_back();
}
}

void solve(int rt){
bcnt=0;
while(stk.size()){stk.pop();}
for(int i=1;i<=n;i++){
    buc[i]=0;
}
dpdfs(rt,0);
srtlng(rt);
dfs(rt,0);
}


signed main(){
cin.tie(0);
ios_base::sync_with_stdio(0);
cin>>n>>M;
for(int i=1;i<=n-1;i++){
    int a;int b;
    cin>>a>>b;
    e[a].push_back(b);
    e[b].push_back(a);
}
for(int i=1;i<=n;i++){cin>>ar[i];}
finrt();
//cout<<rt1<<endl;
solve(rt1);
//cout<<endl;

//cout<<rt2<<endl;
solve(rt2);
//cout<<rt1<<" "<<rt2<<endl;
for(int i=1;i<=n;i++){
    cout<<ans[i]<<endl;
}
}

Compilation message

joi2019_ho_t5.cpp:2: warning: ignoring '#pragma GCC targent' [-Wunknown-pragmas]
    2 | #pragma GCC targent("avx,popcnt,sse4,abm")
      | 
joi2019_ho_t5.cpp: In function 'void dpdfs(int, int)':
joi2019_ho_t5.cpp:19:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 | for(int i=0;i<e[nw].size();i++){
      |             ~^~~~~~~~~~~~~
joi2019_ho_t5.cpp: In function 'void srtlng(int)':
joi2019_ho_t5.cpp:42:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     for(int i=0;i<e[nw].size();i++){
      |                 ~^~~~~~~~~~~~~
joi2019_ho_t5.cpp:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |     for(int i=1;i<e[nw].size();i++){
      |                 ~^~~~~~~~~~~~~
joi2019_ho_t5.cpp: In function 'void dfs(int, int)':
joi2019_ho_t5.cpp:106:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  106 | for(int i=1;i<e[nw].size();i++){
      |             ~^~~~~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 5 ms 5076 KB Output is correct
3 Correct 8 ms 5208 KB Output is correct
4 Correct 9 ms 5204 KB Output is correct
5 Correct 5 ms 5076 KB Output is correct
6 Correct 21 ms 5392 KB Output is correct
7 Correct 11 ms 5204 KB Output is correct
8 Correct 5 ms 5076 KB Output is correct
9 Correct 6 ms 5076 KB Output is correct
10 Correct 5 ms 5076 KB Output is correct
11 Correct 5 ms 5076 KB Output is correct
12 Correct 5 ms 5076 KB Output is correct
13 Correct 19 ms 5332 KB Output is correct
14 Correct 9 ms 5156 KB Output is correct
15 Correct 7 ms 5204 KB Output is correct
16 Correct 5 ms 5076 KB Output is correct
17 Correct 12 ms 5204 KB Output is correct
18 Correct 9 ms 5272 KB Output is correct
19 Correct 5 ms 5076 KB Output is correct
20 Correct 23 ms 5332 KB Output is correct
21 Correct 12 ms 5204 KB Output is correct
22 Correct 7 ms 5076 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 7 ms 5076 KB Output is correct
25 Correct 7 ms 5076 KB Output is correct
26 Correct 7 ms 5076 KB Output is correct
27 Correct 13 ms 5332 KB Output is correct
28 Correct 12 ms 5204 KB Output is correct
29 Correct 8 ms 5204 KB Output is correct
30 Correct 5 ms 5076 KB Output is correct
31 Correct 13 ms 5320 KB Output is correct
32 Correct 10 ms 5204 KB Output is correct

Subtask #2
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 198 ms 11556 KB Output is correct
2 Execution timed out 2088 ms 24596 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 317 ms 14120 KB Output is correct
2 Execution timed out 2082 ms 37304 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4948 KB Output is correct
2 Correct 5 ms 5076 KB Output is correct
3 Correct 8 ms 5208 KB Output is correct
4 Correct 9 ms 5204 KB Output is correct
5 Correct 5 ms 5076 KB Output is correct
6 Correct 21 ms 5392 KB Output is correct
7 Correct 11 ms 5204 KB Output is correct
8 Correct 5 ms 5076 KB Output is correct
9 Correct 6 ms 5076 KB Output is correct
10 Correct 5 ms 5076 KB Output is correct
11 Correct 5 ms 5076 KB Output is correct
12 Correct 5 ms 5076 KB Output is correct
13 Correct 19 ms 5332 KB Output is correct
14 Correct 9 ms 5156 KB Output is correct
15 Correct 7 ms 5204 KB Output is correct
16 Correct 5 ms 5076 KB Output is correct
17 Correct 12 ms 5204 KB Output is correct
18 Correct 9 ms 5272 KB Output is correct
19 Correct 5 ms 5076 KB Output is correct
20 Correct 23 ms 5332 KB Output is correct
21 Correct 12 ms 5204 KB Output is correct
22 Correct 7 ms 5076 KB Output is correct
23 Correct 6 ms 5196 KB Output is correct
24 Correct 7 ms 5076 KB Output is correct
25 Correct 7 ms 5076 KB Output is correct
26 Correct 7 ms 5076 KB Output is correct
27 Correct 13 ms 5332 KB Output is correct
28 Correct 12 ms 5204 KB Output is correct
29 Correct 8 ms 5204 KB Output is correct
30 Correct 5 ms 5076 KB Output is correct
31 Correct 13 ms 5320 KB Output is correct
32 Correct 10 ms 5204 KB Output is correct
33 Correct 198 ms 11556 KB Output is correct
34 Execution timed out 2088 ms 24596 KB Time limit exceeded
35 Halted 0 ms 0 KB -