oj.uz

Submission #93150

# Submission time Handle Problem Language Result Execution time Memory
93150 2019-01-06T15:29:55 Z Vardanyan Hard route (IZhO17_road) C++14
19 / 100
 2000 ms 46956 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 500*1000+5;
vector<int> g[N];
int dist[N];
int par[N];
void dfs(int v,int p = -1){
    par[v] = p;
    for(int i = 0;i<g[v].size();i++){
        int to = g[v][i];
        if(to == p) continue;
        dfs(to,v);
        dist[v] = max(dist[v],dist[to]+1);
    }
}
map<long long,int> H;
long long mx = 0;
int n;
void calc(int v,int hard = 0,int d = 0,int p = -1){
    if((g[v].size() == 1 && d+1 == n)){
        hard = min(hard,dist[v]);
    }
   if(g[v].size() == 1 && p!=-1){
        long long now = (long long)hard*(long long)d;
        H[now]++;
        mx = max(mx,now);
   }
    for(int i = 0;i<g[v].size();i++){
        int to = g[v][i];
        if(to == p) continue;
        int h = -1;
        for(int j = 0;j<g[v].size();j++){
            int too = g[v][j];
            if(too!=to && too!=p){
                if(h == -1 || dist[too]+1>h) h = dist[too]+1;
            }
        }
        int hardd = hard;
        if(h!=-1){
            hardd = max(hardd,h);
        }
        calc(to,hardd,d+1,v);
    }
}
int main(){
    ios_base::sync_with_stdio(false);
    cin>>n;
    for(int i = 1;i<=n-1;i++){
        int x,y;
        cin>>x>>y;
        g[x].push_back(y);
        g[y].push_back(x);
    }
    for(int i = 1;i<=n;i++){
        if(g[i].size() == 1){
            memset(par,0,sizeof par);
            memset(dist,0,sizeof dist);
            dfs(i);
            calc(i);
        }
    }
    //cout<<H[mx]<<endl;
    cout<<mx<<" "<<H[mx]/2<<endl;
	return 0;
}

Compilation message

road.cpp: In function 'void dfs(int, int)':
road.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0;i<g[v].size();i++){
                   ~^~~~~~~~~~~~
road.cpp: In function 'void calc(int, int, int, int)':
road.cpp:28:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i = 0;i<g[v].size();i++){
                   ~^~~~~~~~~~~~
road.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j = 0;j<g[v].size();j++){
                       ~^~~~~~~~~~~~

Subtask #1
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15992 KB Output is correct
2 Correct 15 ms 15992 KB Output is correct
3 Correct 15 ms 15996 KB Output is correct
4 Correct 15 ms 15992 KB Output is correct
5 Correct 16 ms 15964 KB Output is correct
6 Correct 15 ms 15996 KB Output is correct
7 Correct 20 ms 15992 KB Output is correct
8 Correct 19 ms 15992 KB Output is correct
9 Correct 18 ms 15992 KB Output is correct
10 Correct 18 ms 15992 KB Output is correct
11 Correct 24 ms 15992 KB Output is correct
12 Correct 22 ms 15992 KB Output is correct
13 Correct 25 ms 15992 KB Output is correct
14 Correct 25 ms 15992 KB Output is correct
15 Correct 16 ms 15992 KB Output is correct
16 Correct 16 ms 15992 KB Output is correct
17 Correct 14 ms 15992 KB Output is correct
18 Correct 15 ms 15992 KB Output is correct
19 Correct 13 ms 15992 KB Output is correct
20 Correct 13 ms 15992 KB Output is correct
21 Correct 13 ms 15992 KB Output is correct
22 Correct 14 ms 15932 KB Output is correct
23 Correct 15 ms 15992 KB Output is correct
24 Correct 35 ms 16036 KB Output is correct

Subtask #2
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15992 KB Output is correct
2 Correct 15 ms 15992 KB Output is correct
3 Correct 15 ms 15996 KB Output is correct
4 Correct 15 ms 15992 KB Output is correct
5 Correct 16 ms 15964 KB Output is correct
6 Correct 15 ms 15996 KB Output is correct
7 Correct 20 ms 15992 KB Output is correct
8 Correct 19 ms 15992 KB Output is correct
9 Correct 18 ms 15992 KB Output is correct
10 Correct 18 ms 15992 KB Output is correct
11 Correct 24 ms 15992 KB Output is correct
12 Correct 22 ms 15992 KB Output is correct
13 Correct 25 ms 15992 KB Output is correct
14 Correct 25 ms 15992 KB Output is correct
15 Correct 16 ms 15992 KB Output is correct
16 Correct 16 ms 15992 KB Output is correct
17 Correct 14 ms 15992 KB Output is correct
18 Correct 15 ms 15992 KB Output is correct
19 Correct 13 ms 15992 KB Output is correct
20 Correct 13 ms 15992 KB Output is correct
21 Correct 13 ms 15992 KB Output is correct
22 Correct 14 ms 15932 KB Output is correct
23 Correct 15 ms 15992 KB Output is correct
24 Correct 35 ms 16036 KB Output is correct
25 Correct 594 ms 16472 KB Output is correct
26 Correct 573 ms 16504 KB Output is correct
27 Correct 590 ms 16504 KB Output is correct
28 Correct 591 ms 16376 KB Output is correct
29 Execution timed out 2055 ms 46956 KB Time limit exceeded
30 Halted 0 ms 0 KB -

Subtask #3
0 / 48.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 15992 KB Output is correct
2 Correct 15 ms 15992 KB Output is correct
3 Correct 15 ms 15996 KB Output is correct
4 Correct 15 ms 15992 KB Output is correct
5 Correct 16 ms 15964 KB Output is correct
6 Correct 15 ms 15996 KB Output is correct
7 Correct 20 ms 15992 KB Output is correct
8 Correct 19 ms 15992 KB Output is correct
9 Correct 18 ms 15992 KB Output is correct
10 Correct 18 ms 15992 KB Output is correct
11 Correct 24 ms 15992 KB Output is correct
12 Correct 22 ms 15992 KB Output is correct
13 Correct 25 ms 15992 KB Output is correct
14 Correct 25 ms 15992 KB Output is correct
15 Correct 16 ms 15992 KB Output is correct
16 Correct 16 ms 15992 KB Output is correct
17 Correct 14 ms 15992 KB Output is correct
18 Correct 15 ms 15992 KB Output is correct
19 Correct 13 ms 15992 KB Output is correct
20 Correct 13 ms 15992 KB Output is correct
21 Correct 13 ms 15992 KB Output is correct
22 Correct 14 ms 15932 KB Output is correct
23 Correct 15 ms 15992 KB Output is correct
24 Correct 35 ms 16036 KB Output is correct
25 Correct 594 ms 16472 KB Output is correct
26 Correct 573 ms 16504 KB Output is correct
27 Correct 590 ms 16504 KB Output is correct
28 Correct 591 ms 16376 KB Output is correct
29 Execution timed out 2055 ms 46956 KB Time limit exceeded
30 Halted 0 ms 0 KB -