oj.uz

Submission #943841

# Submission time Handle Problem Language Result Execution time Memory
943841 2024-03-12T02:11:39 Z guagua0407 Capital City (JOI20_capital_city) C++17
100 / 100
 421 ms 35732 KB 
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int mxn=2e5+5;
const int inf=1e9;
vector<int> adj[mxn];
bool visited[mxn];
int sz[mxn];
vector<int> belong[mxn];
bool now[mxn];
int par[mxn];
int c[mxn];
bool did[mxn];
int ans=inf;
vector<int> st;

int dfs(int v,int p=0){
    sz[v]=1;
    st.push_back(v);
    now[v]=true;
    for(auto u:adj[v]){
        if(visited[u] or u==p) continue;
        sz[v]+=dfs(u,v);
    }
    return sz[v];
}

int find(int v,int val,int p=0){
    for(auto u:adj[v]){
        if(visited[u] or u==p) continue;
        if(sz[u]*2>val) return find(u,val,v);
    }
    return v;
}

void dfs2(int v,int p=0){
    par[v]=p;
    for(auto u:adj[v]){
        if(visited[u] or u==p) continue;
        dfs2(u,v);
    }
}

void centroid(int v){
    v=find(v,dfs(v));
    dfs2(v);
    queue<int> q;
    vector<int> tmp;
    q.push(c[v]);
    did[c[v]]=true;
    tmp.push_back(c[v]);
    bool ok=true;
    while(!q.empty()){
        int C=q.front();
        q.pop();
        for(auto x:belong[C]){
            if(!now[x]){
                ok=false;
                break;
            }
            if(par[x]!=0 and !did[c[par[x]]]){
                did[c[par[x]]]=true;
                tmp.push_back(c[par[x]]);
                q.push(c[par[x]]);
            }
        }
        if(!ok){
            break;
        }
    }
    for(auto C:tmp){
        did[C]=false;
    }
    for(auto x:st){
        now[x]=false;
    }
    st.clear();
    if(ok){
        ans=min(ans,(int)tmp.size()-1);
    }
    visited[v]=true;
    for(auto u:adj[v]){
        if(!visited[u]){
            centroid(u);
        }
    }
}

int main() {_
    int n,k;
    cin>>n>>k;
    for(int i=0;i<n-1;i++){
        int a,b;
        cin>>a>>b;
        adj[a].push_back(b);
        adj[b].push_back(a);
    }
    for(int i=1;i<=n;i++){
        cin>>c[i];
        belong[c[i]].push_back(i);
    }
    centroid(1);
    assert(ans!=inf);
    cout<<ans<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//laborz

Compilation message

capital_city.cpp: In function 'void setIO(std::string)':
capital_city.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
capital_city.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12632 KB Output is correct
2 Correct 4 ms 12576 KB Output is correct
3 Correct 4 ms 12572 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 4 ms 12380 KB Output is correct
6 Correct 4 ms 12380 KB Output is correct
7 Correct 4 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 4 ms 12608 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12632 KB Output is correct
2 Correct 4 ms 12576 KB Output is correct
3 Correct 4 ms 12572 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 4 ms 12380 KB Output is correct
6 Correct 4 ms 12380 KB Output is correct
7 Correct 4 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 4 ms 12608 KB Output is correct
11 Correct 5 ms 12632 KB Output is correct
12 Correct 5 ms 12636 KB Output is correct
13 Correct 5 ms 12636 KB Output is correct
14 Correct 5 ms 12636 KB Output is correct
15 Correct 5 ms 12632 KB Output is correct
16 Correct 5 ms 12636 KB Output is correct
17 Correct 5 ms 12636 KB Output is correct
18 Correct 5 ms 12636 KB Output is correct
19 Correct 5 ms 12576 KB Output is correct
20 Correct 5 ms 12636 KB Output is correct
21 Correct 5 ms 12636 KB Output is correct
22 Correct 5 ms 12632 KB Output is correct
23 Correct 5 ms 12632 KB Output is correct
24 Correct 5 ms 12636 KB Output is correct
25 Correct 5 ms 12636 KB Output is correct
26 Correct 5 ms 12632 KB Output is correct
27 Correct 6 ms 12636 KB Output is correct
28 Correct 5 ms 12676 KB Output is correct
29 Correct 5 ms 12636 KB Output is correct
30 Correct 5 ms 12636 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 266 ms 34912 KB Output is correct
2 Correct 145 ms 35732 KB Output is correct
3 Correct 333 ms 34764 KB Output is correct
4 Correct 146 ms 35480 KB Output is correct
5 Correct 269 ms 32196 KB Output is correct
6 Correct 155 ms 35304 KB Output is correct
7 Correct 266 ms 32540 KB Output is correct
8 Correct 138 ms 35016 KB Output is correct
9 Correct 323 ms 31172 KB Output is correct
10 Correct 321 ms 29132 KB Output is correct
11 Correct 421 ms 31376 KB Output is correct
12 Correct 323 ms 33984 KB Output is correct
13 Correct 339 ms 28872 KB Output is correct
14 Correct 325 ms 33848 KB Output is correct
15 Correct 384 ms 33664 KB Output is correct
16 Correct 365 ms 29640 KB Output is correct
17 Correct 310 ms 30144 KB Output is correct
18 Correct 318 ms 30408 KB Output is correct
19 Correct 353 ms 32716 KB Output is correct
20 Correct 392 ms 34576 KB Output is correct
21 Correct 4 ms 12376 KB Output is correct

Subtask #4
59.0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 12632 KB Output is correct
2 Correct 4 ms 12576 KB Output is correct
3 Correct 4 ms 12572 KB Output is correct
4 Correct 4 ms 12380 KB Output is correct
5 Correct 4 ms 12380 KB Output is correct
6 Correct 4 ms 12380 KB Output is correct
7 Correct 4 ms 12380 KB Output is correct
8 Correct 4 ms 12380 KB Output is correct
9 Correct 4 ms 12380 KB Output is correct
10 Correct 4 ms 12608 KB Output is correct
11 Correct 5 ms 12632 KB Output is correct
12 Correct 5 ms 12636 KB Output is correct
13 Correct 5 ms 12636 KB Output is correct
14 Correct 5 ms 12636 KB Output is correct
15 Correct 5 ms 12632 KB Output is correct
16 Correct 5 ms 12636 KB Output is correct
17 Correct 5 ms 12636 KB Output is correct
18 Correct 5 ms 12636 KB Output is correct
19 Correct 5 ms 12576 KB Output is correct
20 Correct 5 ms 12636 KB Output is correct
21 Correct 5 ms 12636 KB Output is correct
22 Correct 5 ms 12632 KB Output is correct
23 Correct 5 ms 12632 KB Output is correct
24 Correct 5 ms 12636 KB Output is correct
25 Correct 5 ms 12636 KB Output is correct
26 Correct 5 ms 12632 KB Output is correct
27 Correct 6 ms 12636 KB Output is correct
28 Correct 5 ms 12676 KB Output is correct
29 Correct 5 ms 12636 KB Output is correct
30 Correct 5 ms 12636 KB Output is correct
31 Correct 266 ms 34912 KB Output is correct
32 Correct 145 ms 35732 KB Output is correct
33 Correct 333 ms 34764 KB Output is correct
34 Correct 146 ms 35480 KB Output is correct
35 Correct 269 ms 32196 KB Output is correct
36 Correct 155 ms 35304 KB Output is correct
37 Correct 266 ms 32540 KB Output is correct
38 Correct 138 ms 35016 KB Output is correct
39 Correct 323 ms 31172 KB Output is correct
40 Correct 321 ms 29132 KB Output is correct
41 Correct 421 ms 31376 KB Output is correct
42 Correct 323 ms 33984 KB Output is correct
43 Correct 339 ms 28872 KB Output is correct
44 Correct 325 ms 33848 KB Output is correct
45 Correct 384 ms 33664 KB Output is correct
46 Correct 365 ms 29640 KB Output is correct
47 Correct 310 ms 30144 KB Output is correct
48 Correct 318 ms 30408 KB Output is correct
49 Correct 353 ms 32716 KB Output is correct
50 Correct 392 ms 34576 KB Output is correct
51 Correct 4 ms 12376 KB Output is correct
52 Correct 219 ms 21716 KB Output is correct
53 Correct 207 ms 21652 KB Output is correct
54 Correct 237 ms 21692 KB Output is correct
55 Correct 209 ms 21760 KB Output is correct
56 Correct 251 ms 21764 KB Output is correct
57 Correct 214 ms 21704 KB Output is correct
58 Correct 208 ms 24520 KB Output is correct
59 Correct 238 ms 24756 KB Output is correct
60 Correct 257 ms 24500 KB Output is correct
61 Correct 270 ms 24064 KB Output is correct
62 Correct 145 ms 35492 KB Output is correct
63 Correct 146 ms 35272 KB Output is correct
64 Correct 144 ms 35268 KB Output is correct
65 Correct 144 ms 35268 KB Output is correct
66 Correct 188 ms 28476 KB Output is correct
67 Correct 182 ms 28296 KB Output is correct
68 Correct 176 ms 28528 KB Output is correct
69 Correct 237 ms 28548 KB Output is correct
70 Correct 179 ms 28628 KB Output is correct
71 Correct 180 ms 28612 KB Output is correct
72 Correct 181 ms 28556 KB Output is correct
73 Correct 191 ms 27896 KB Output is correct
74 Correct 191 ms 28592 KB Output is correct
75 Correct 185 ms 28616 KB Output is correct
76 Correct 255 ms 27596 KB Output is correct
77 Correct 307 ms 26260 KB Output is correct
78 Correct 319 ms 30160 KB Output is correct
79 Correct 355 ms 28496 KB Output is correct
80 Correct 318 ms 33980 KB Output is correct
81 Correct 343 ms 31428 KB Output is correct
82 Correct 319 ms 31420 KB Output is correct
83 Correct 378 ms 28620 KB Output is correct
84 Correct 345 ms 33340 KB Output is correct
85 Correct 337 ms 32132 KB Output is correct
86 Correct 368 ms 28368 KB Output is correct
87 Correct 345 ms 29952 KB Output is correct
88 Correct 271 ms 30668 KB Output is correct
89 Correct 277 ms 27344 KB Output is correct
90 Correct 272 ms 27240 KB Output is correct
91 Correct 287 ms 29212 KB Output is correct
92 Correct 372 ms 28172 KB Output is correct
93 Correct 300 ms 27856 KB Output is correct
94 Correct 298 ms 27280 KB Output is correct
95 Correct 279 ms 28620 KB Output is correct
96 Correct 282 ms 27520 KB Output is correct
97 Correct 290 ms 29080 KB Output is correct