oj.uz

Submission #315353

# Submission time Handle Problem Language Result Execution time Memory
315353 2020-10-22T15:10:03 Z georgerapeanu Capital City (JOI20_capital_city) C++11
41 / 100
 3000 ms 42488 KB 
#include <bits/stdc++.h>

using namespace std;

const int NMAX = 200000;

int n,k;
int color[NMAX + 5];
vector<int> nodes[NMAX + 5];
vector<int> graph[NMAX + 5];

bool inCentroid[NMAX + 5];
int weight[NMAX + 5];
int father[NMAX + 5];
bool viz[NMAX + 5];
int group[NMAX + 5];
int processed[NMAX + 5];
int global_ans = 1e9;

void predfs(int nod,int tata,int centroid){
    weight[nod] = 1;
    processed[color[nod]] = false;
    viz[nod] = 0;
    group[nod] = centroid;
    father[nod] = tata;

    for(auto it:graph[nod]){
        if(it == tata || inCentroid[nod]){
            continue;            
        }
        predfs(it,nod,centroid);
        weight[nod] += weight[it];
    }


}

void dfs(int nod){
    int _father = 0;
    int centroid = nod;

    while(true){
        int bigChild = -1;

        for(auto it:graph[centroid]){
            if(it == _father || inCentroid[it]){
                continue;
            }
            if(bigChild == -1 || weight[bigChild] < weight[it]){
                bigChild = it;
            }
        }
        
        if(weight[bigChild] * 2 > weight[nod]){
            _father = centroid;
            centroid = bigChild;
        }
        else{
            break;    
        }
    }

    predfs(centroid,0,centroid);
    vector<int> colors = {color[centroid]};
    inCentroid[centroid] = true;

    int ans = -1;

    processed[colors.back()] = true;

    while(colors.size()){
        ans++;
        int col = colors.back();
        colors.pop_back();

        for(auto it:nodes[col]){
            if(group[it] != centroid){
                ans = 1e9;
                break;
            }
            int nod = it;
            while(nod && viz[nod] == 0){
                viz[nod] = 1;
                if(processed[color[nod]] == 0){
                    colors.push_back(color[nod]);
                    processed[color[nod]] = true;
                }
                nod = father[nod];
            }
        }

        if(ans == 1e9){
            break;
        }
    }

    global_ans = min(global_ans,ans);

    for(auto it:graph[centroid]){
        if(inCentroid[it] == 0){
            dfs(it);
        }
    }
}

int main(){

    scanf("%d %d",&n,&k);

    for(int i = 1;i < n;i++){
        int x,y;
        scanf("%d %d",&x,&y);
        graph[x].push_back(y);
        graph[y].push_back(x);
    }

    for(int i = 1;i <= n;i++){
        scanf("%d",&color[i]);
        nodes[color[i]].push_back(i);
    }

    predfs(1,0,0);
    dfs(1);

    printf("%d\n",global_ans);    

    return 0;
}

Compilation message

capital_city.cpp: In function 'int main()':
capital_city.cpp:108:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  108 |     scanf("%d %d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~~
capital_city.cpp:112:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  112 |         scanf("%d %d",&x,&y);
      |         ~~~~~^~~~~~~~~~~~~~~
capital_city.cpp:118:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  118 |         scanf("%d",&color[i]);
      |         ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
1.0 / 1.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 9 ms 9888 KB Output is correct
12 Correct 9 ms 9856 KB Output is correct
13 Correct 9 ms 9856 KB Output is correct
14 Correct 9 ms 9856 KB Output is correct
15 Correct 9 ms 9984 KB Output is correct
16 Correct 9 ms 9984 KB Output is correct
17 Correct 10 ms 9984 KB Output is correct
18 Correct 10 ms 10112 KB Output is correct
19 Correct 9 ms 9984 KB Output is correct
20 Correct 9 ms 9984 KB Output is correct
21 Correct 9 ms 9984 KB Output is correct
22 Correct 8 ms 10112 KB Output is correct
23 Correct 11 ms 9892 KB Output is correct
24 Correct 9 ms 9984 KB Output is correct
25 Correct 9 ms 9984 KB Output is correct
26 Correct 10 ms 9984 KB Output is correct
27 Correct 9 ms 9984 KB Output is correct
28 Correct 9 ms 9984 KB Output is correct
29 Correct 9 ms 9984 KB Output is correct
30 Correct 9 ms 9984 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 645 ms 41976 KB Output is correct
2 Correct 213 ms 42360 KB Output is correct
3 Correct 629 ms 41592 KB Output is correct
4 Correct 217 ms 42488 KB Output is correct
5 Correct 618 ms 38648 KB Output is correct
6 Correct 220 ms 42376 KB Output is correct
7 Correct 596 ms 38944 KB Output is correct
8 Correct 211 ms 42104 KB Output is correct
9 Correct 671 ms 37396 KB Output is correct
10 Correct 656 ms 34852 KB Output is correct
11 Correct 701 ms 37884 KB Output is correct
12 Correct 646 ms 40312 KB Output is correct
13 Correct 638 ms 34424 KB Output is correct
14 Correct 675 ms 40712 KB Output is correct
15 Correct 649 ms 40568 KB Output is correct
16 Correct 651 ms 35476 KB Output is correct
17 Correct 647 ms 35960 KB Output is correct
18 Correct 652 ms 36244 KB Output is correct
19 Correct 666 ms 39208 KB Output is correct
20 Correct 656 ms 41592 KB Output is correct
21 Correct 8 ms 9728 KB Output is correct

Subtask #4
0 / 59.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 9728 KB Output is correct
2 Correct 7 ms 9728 KB Output is correct
3 Correct 7 ms 9728 KB Output is correct
4 Correct 7 ms 9728 KB Output is correct
5 Correct 7 ms 9728 KB Output is correct
6 Correct 7 ms 9728 KB Output is correct
7 Correct 7 ms 9728 KB Output is correct
8 Correct 7 ms 9728 KB Output is correct
9 Correct 7 ms 9728 KB Output is correct
10 Correct 8 ms 9728 KB Output is correct
11 Correct 9 ms 9888 KB Output is correct
12 Correct 9 ms 9856 KB Output is correct
13 Correct 9 ms 9856 KB Output is correct
14 Correct 9 ms 9856 KB Output is correct
15 Correct 9 ms 9984 KB Output is correct
16 Correct 9 ms 9984 KB Output is correct
17 Correct 10 ms 9984 KB Output is correct
18 Correct 10 ms 10112 KB Output is correct
19 Correct 9 ms 9984 KB Output is correct
20 Correct 9 ms 9984 KB Output is correct
21 Correct 9 ms 9984 KB Output is correct
22 Correct 8 ms 10112 KB Output is correct
23 Correct 11 ms 9892 KB Output is correct
24 Correct 9 ms 9984 KB Output is correct
25 Correct 9 ms 9984 KB Output is correct
26 Correct 10 ms 9984 KB Output is correct
27 Correct 9 ms 9984 KB Output is correct
28 Correct 9 ms 9984 KB Output is correct
29 Correct 9 ms 9984 KB Output is correct
30 Correct 9 ms 9984 KB Output is correct
31 Correct 645 ms 41976 KB Output is correct
32 Correct 213 ms 42360 KB Output is correct
33 Correct 629 ms 41592 KB Output is correct
34 Correct 217 ms 42488 KB Output is correct
35 Correct 618 ms 38648 KB Output is correct
36 Correct 220 ms 42376 KB Output is correct
37 Correct 596 ms 38944 KB Output is correct
38 Correct 211 ms 42104 KB Output is correct
39 Correct 671 ms 37396 KB Output is correct
40 Correct 656 ms 34852 KB Output is correct
41 Correct 701 ms 37884 KB Output is correct
42 Correct 646 ms 40312 KB Output is correct
43 Correct 638 ms 34424 KB Output is correct
44 Correct 675 ms 40712 KB Output is correct
45 Correct 649 ms 40568 KB Output is correct
46 Correct 651 ms 35476 KB Output is correct
47 Correct 647 ms 35960 KB Output is correct
48 Correct 652 ms 36244 KB Output is correct
49 Correct 666 ms 39208 KB Output is correct
50 Correct 656 ms 41592 KB Output is correct
51 Correct 8 ms 9728 KB Output is correct
52 Correct 510 ms 25012 KB Output is correct
53 Correct 512 ms 24956 KB Output is correct
54 Correct 502 ms 25080 KB Output is correct
55 Correct 521 ms 24952 KB Output is correct
56 Correct 497 ms 24952 KB Output is correct
57 Correct 499 ms 24952 KB Output is correct
58 Correct 501 ms 28920 KB Output is correct
59 Correct 474 ms 29048 KB Output is correct
60 Correct 582 ms 28444 KB Output is correct
61 Correct 608 ms 28152 KB Output is correct
62 Correct 220 ms 42324 KB Output is correct
63 Correct 213 ms 42360 KB Output is correct
64 Correct 214 ms 42104 KB Output is correct
65 Correct 215 ms 42360 KB Output is correct
66 Execution timed out 3071 ms 33600 KB Time limit exceeded
67 Halted 0 ms 0 KB -