oj.uz

Submission #240331

# Submission time Handle Problem Language Result Execution time Memory
240331 2020-06-19T10:35:15 Z mhy908 Capital City (JOI20_capital_city) C++14
100 / 100
 950 ms 46572 KB 
#include <bits/stdc++.h>
#define eb emplace_back
const int inf=987654321;
using namespace std;
typedef long long LL;
int n, k, col[200010], siz[200010];
vector<int> link[200010], vcm[200010];
void dfs(int num, int par){
    siz[num]=1;
    vcm[col[num]].eb(num);
    for(auto i:link[num]){
        if(i==par)continue;
        dfs(i, num);
        siz[num]+=siz[i];
    }
}
bool ch[200010];
int get_centroid(int num, int par, int sz){
    bool flag=true;
    for(auto i:link[num]){
        if(ch[i])continue;
        if(siz[i]>sz/2)flag=false;
    }
    if(flag)return num;
    for(auto i:link[num]){
        if(i==par||ch[i])continue;
        int temp=siz[i];
        siz[num]=sz-siz[i];
        siz[i]=sz;
        int ret=get_centroid(i, num, sz);
        if(ret)return ret;
        siz[num]=sz;
        siz[i]=temp;
    }
    return 0;
}
int ans=inf, p[200010];
vector<int> vc[200010], tmp;
void dfs2(int num, int par){
    p[num]=par;
    tmp.eb(col[num]);
    vc[col[num]].eb(num);
    for(auto i:link[num]){
        if(i==par||ch[i])continue;
        dfs2(i, num);
    }
}
int que[200010], re, fr;
bool ch2[200010];
void make_centroidtree(int num, int par){
    int cen=get_centroid(num, 0, siz[num]), ret=0; re=0;
    ch[cen]=true;
    dfs2(cen, 0);
    if(vc[col[cen]].size()!=vcm[col[cen]].size())ret=inf;
    for(auto i:vc[col[cen]])que[++re]=i;
    ch2[col[cen]]=true;
    for(fr=1; fr<=re; fr++){
        if(ch2[col[p[que[fr]]]])continue;
        ch2[col[p[que[fr]]]]=true;
        if(vc[col[p[que[fr]]]].size()!=vcm[col[p[que[fr]]]].size())ret=inf;
        for(auto i:vc[col[p[que[fr]]]])que[++re]=i;
        ret++;
    }
    ans=min(ans, ret);
    for(auto i:tmp){
        ch2[i]=false;
        vc[i].clear();
    }
  	tmp.clear();
    for(auto i:link[cen]){
        if(!ch[i])make_centroidtree(i, cen);
    }
}
int main(){
    scanf("%d %d", &n, &k);
    ch2[0]=true;
    for(int i=1; i<n; i++){
        int a, b;
        scanf("%d %d", &a, &b);
        link[a].eb(b);
        link[b].eb(a);
    }
    for(int i=1; i<=n; i++)scanf("%d", &col[i]);
    dfs(1, 0);
    make_centroidtree(1, 0);
    printf("%d", ans);
}

Compilation message

capital_city.cpp: In function 'int main()':
capital_city.cpp:75:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~
capital_city.cpp:79:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d %d", &a, &b);
         ~~~~~^~~~~~~~~~~~~~~~~
capital_city.cpp:83:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for(int i=1; i<=n; i++)scanf("%d", &col[i]);
                            ~~~~~^~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 15 ms 14464 KB Output is correct
7 Correct 15 ms 14464 KB Output is correct
8 Correct 13 ms 14464 KB Output is correct
9 Correct 13 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 15 ms 14464 KB Output is correct
7 Correct 15 ms 14464 KB Output is correct
8 Correct 13 ms 14464 KB Output is correct
9 Correct 13 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct
11 Correct 18 ms 14592 KB Output is correct
12 Correct 15 ms 14592 KB Output is correct
13 Correct 15 ms 14592 KB Output is correct
14 Correct 14 ms 14592 KB Output is correct
15 Correct 15 ms 14592 KB Output is correct
16 Correct 16 ms 14592 KB Output is correct
17 Correct 14 ms 14592 KB Output is correct
18 Correct 15 ms 14720 KB Output is correct
19 Correct 15 ms 14720 KB Output is correct
20 Correct 16 ms 14720 KB Output is correct
21 Correct 16 ms 14592 KB Output is correct
22 Correct 15 ms 14720 KB Output is correct
23 Correct 15 ms 14720 KB Output is correct
24 Correct 15 ms 14592 KB Output is correct
25 Correct 15 ms 14592 KB Output is correct
26 Correct 15 ms 14720 KB Output is correct
27 Correct 16 ms 14720 KB Output is correct
28 Correct 15 ms 14592 KB Output is correct
29 Correct 15 ms 14592 KB Output is correct
30 Correct 15 ms 14592 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 788 ms 42604 KB Output is correct
2 Correct 241 ms 42988 KB Output is correct
3 Correct 730 ms 42468 KB Output is correct
4 Correct 249 ms 42856 KB Output is correct
5 Correct 709 ms 39660 KB Output is correct
6 Correct 248 ms 42988 KB Output is correct
7 Correct 688 ms 39788 KB Output is correct
8 Correct 245 ms 45804 KB Output is correct
9 Correct 729 ms 41452 KB Output is correct
10 Correct 752 ms 39524 KB Output is correct
11 Correct 950 ms 41708 KB Output is correct
12 Correct 712 ms 43836 KB Output is correct
13 Correct 700 ms 39020 KB Output is correct
14 Correct 725 ms 44252 KB Output is correct
15 Correct 804 ms 44008 KB Output is correct
16 Correct 749 ms 39856 KB Output is correct
17 Correct 752 ms 40428 KB Output is correct
18 Correct 698 ms 40552 KB Output is correct
19 Correct 716 ms 43244 KB Output is correct
20 Correct 756 ms 45036 KB Output is correct
21 Correct 15 ms 14464 KB Output is correct

Subtask #4
59.0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 14464 KB Output is correct
2 Correct 13 ms 14464 KB Output is correct
3 Correct 13 ms 14464 KB Output is correct
4 Correct 13 ms 14464 KB Output is correct
5 Correct 13 ms 14464 KB Output is correct
6 Correct 15 ms 14464 KB Output is correct
7 Correct 15 ms 14464 KB Output is correct
8 Correct 13 ms 14464 KB Output is correct
9 Correct 13 ms 14464 KB Output is correct
10 Correct 13 ms 14464 KB Output is correct
11 Correct 18 ms 14592 KB Output is correct
12 Correct 15 ms 14592 KB Output is correct
13 Correct 15 ms 14592 KB Output is correct
14 Correct 14 ms 14592 KB Output is correct
15 Correct 15 ms 14592 KB Output is correct
16 Correct 16 ms 14592 KB Output is correct
17 Correct 14 ms 14592 KB Output is correct
18 Correct 15 ms 14720 KB Output is correct
19 Correct 15 ms 14720 KB Output is correct
20 Correct 16 ms 14720 KB Output is correct
21 Correct 16 ms 14592 KB Output is correct
22 Correct 15 ms 14720 KB Output is correct
23 Correct 15 ms 14720 KB Output is correct
24 Correct 15 ms 14592 KB Output is correct
25 Correct 15 ms 14592 KB Output is correct
26 Correct 15 ms 14720 KB Output is correct
27 Correct 16 ms 14720 KB Output is correct
28 Correct 15 ms 14592 KB Output is correct
29 Correct 15 ms 14592 KB Output is correct
30 Correct 15 ms 14592 KB Output is correct
31 Correct 788 ms 42604 KB Output is correct
32 Correct 241 ms 42988 KB Output is correct
33 Correct 730 ms 42468 KB Output is correct
34 Correct 249 ms 42856 KB Output is correct
35 Correct 709 ms 39660 KB Output is correct
36 Correct 248 ms 42988 KB Output is correct
37 Correct 688 ms 39788 KB Output is correct
38 Correct 245 ms 45804 KB Output is correct
39 Correct 729 ms 41452 KB Output is correct
40 Correct 752 ms 39524 KB Output is correct
41 Correct 950 ms 41708 KB Output is correct
42 Correct 712 ms 43836 KB Output is correct
43 Correct 700 ms 39020 KB Output is correct
44 Correct 725 ms 44252 KB Output is correct
45 Correct 804 ms 44008 KB Output is correct
46 Correct 749 ms 39856 KB Output is correct
47 Correct 752 ms 40428 KB Output is correct
48 Correct 698 ms 40552 KB Output is correct
49 Correct 716 ms 43244 KB Output is correct
50 Correct 756 ms 45036 KB Output is correct
51 Correct 15 ms 14464 KB Output is correct
52 Correct 524 ms 31604 KB Output is correct
53 Correct 549 ms 31724 KB Output is correct
54 Correct 518 ms 31468 KB Output is correct
55 Correct 643 ms 31696 KB Output is correct
56 Correct 552 ms 31596 KB Output is correct
57 Correct 553 ms 31684 KB Output is correct
58 Correct 574 ms 35436 KB Output is correct
59 Correct 522 ms 35304 KB Output is correct
60 Correct 667 ms 35052 KB Output is correct
61 Correct 701 ms 35012 KB Output is correct
62 Correct 255 ms 46548 KB Output is correct
63 Correct 245 ms 46572 KB Output is correct
64 Correct 260 ms 46192 KB Output is correct
65 Correct 251 ms 46444 KB Output is correct
66 Correct 400 ms 39148 KB Output is correct
67 Correct 382 ms 39036 KB Output is correct
68 Correct 425 ms 39148 KB Output is correct
69 Correct 377 ms 39116 KB Output is correct
70 Correct 521 ms 39020 KB Output is correct
71 Correct 378 ms 39020 KB Output is correct
72 Correct 463 ms 39020 KB Output is correct
73 Correct 381 ms 38448 KB Output is correct
74 Correct 445 ms 39356 KB Output is correct
75 Correct 399 ms 39148 KB Output is correct
76 Correct 588 ms 39020 KB Output is correct
77 Correct 689 ms 37276 KB Output is correct
78 Correct 777 ms 40296 KB Output is correct
79 Correct 713 ms 38804 KB Output is correct
80 Correct 712 ms 44268 KB Output is correct
81 Correct 694 ms 41452 KB Output is correct
82 Correct 745 ms 41644 KB Output is correct
83 Correct 716 ms 39020 KB Output is correct
84 Correct 824 ms 43752 KB Output is correct
85 Correct 728 ms 42528 KB Output is correct
86 Correct 909 ms 38632 KB Output is correct
87 Correct 717 ms 40048 KB Output is correct
88 Correct 625 ms 40940 KB Output is correct
89 Correct 722 ms 37744 KB Output is correct
90 Correct 611 ms 37632 KB Output is correct
91 Correct 612 ms 39436 KB Output is correct
92 Correct 611 ms 38504 KB Output is correct
93 Correct 680 ms 38124 KB Output is correct
94 Correct 613 ms 37488 KB Output is correct
95 Correct 756 ms 38888 KB Output is correct
96 Correct 615 ms 37864 KB Output is correct
97 Correct 597 ms 39276 KB Output is correct