oj.uz

Submission #210020

# Submission time Handle Problem Language Result Execution time Memory
210020 2020-03-16T10:51:26 Z brcode Race (IOI11_race) C++14
100 / 100
 1747 ms 57316 KB 
#include <iostream>
#include <race.h>
#include <bits/stdc++.h>
using namespace std;
const long long MAXN = 2e5+5;
long long ans =1e18;
long long sz[MAXN];
bool used[MAXN];
long long n,k;
map<long long,long long> m1;
vector<pair<long long,long long>> toadd;
long long currsz = 0;
vector<pair<long long,long long>> v1[MAXN];

void dfs(long long curr,long long par){
    currsz++;
    sz[curr] = 1;
    for(auto x:v1[curr]){
        if(!used[x.first] && x.first!=par){
            dfs(x.first,curr);
            sz[curr]+=sz[x.first];
        }
    }
}
long long centroid(long long curr,long long par){
    for(auto x:v1[curr]){
        if(!used[x.first] && x.first!=par && sz[x.first]>currsz/2){
            return centroid(x.first,curr);
        }
    }
    return curr;
}
void dfsans(long long curr,long long par,long long val,long long depth){
    for(auto x:v1[curr]){
        if(x.first!=par && !used[x.first]){
            toadd.push_back(make_pair(val+x.second,depth+1));
            dfsans(x.first,curr,val+x.second,depth+1);
        }
    }
}
void decompose(long long u,long long par){
    currsz = 0;
    dfs(u,u);
    long long cen = centroid(u,u);
    
    //link[cen] = par;
    //find all paths through the centroid
    m1.clear();
    for(auto x:v1[cen]){
        if(!used[x.first]){
            
            toadd.clear();
            toadd.push_back(make_pair(x.second,1));
            dfsans(x.first,cen,x.second,1);
            
        
            for(auto y:toadd){
    
                if(k-y.first>=0 && m1[k-y.first]){
                  //  cout<<x.first<<" "<<cen<<" "<<y.first<<endl;
                    ans = min(ans,m1[k-y.first]+y.second);
                }
                if(y.first == k){
                    
                    ans = min(ans,y.second);
                }
            }
            for(auto y:toadd){
               // cout<<cen<<" "<<y.first<<" "<<y.second<<endl;
               
                if(!m1[y.first]){
                    m1[y.first] = y.second;
                }else{
                    
                    m1[y.first] = min(m1[y.first],y.second);
                }
                
                
            }
        }
    }
    
    used[cen] = true;
    for(auto x:v1[cen]){
        if(!used[x.first]){
            decompose(x.first,cen);
        }
    }
    used[cen] = false;
}
int best_path(int N,int K,int H[][2],int L[]){
    n = N;
    k = K;
    for(long long i=0;i<n-1;i++){
        long long u = H[i][0];
        long long v = H[i][1];
        long long w = L[i];
        u++;v++;
        v1[u].push_back(make_pair(v,w));
        v1[v].push_back(make_pair(u,w));
    }
    decompose(1,1);
    if(ans == 1e18){
        return -1;
    }
    return (int)ans;
}
/*int main(){
    cin>>n>>k;
    for(long long i=0;i<n-1;i++){
        long long u,v,w;
        cin>>u>>v>>w;
        
        u++;v++;
        v1[u].push_back(make_pair(v,w));
        v1[v].push_back(make_pair(u,w));
    }
    decompose(1,1);
    cout<<ans<<endl;
}
*/

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5112 KB Output is correct
2 Correct 7 ms 4984 KB Output is correct
3 Correct 8 ms 5112 KB Output is correct
4 Correct 7 ms 4984 KB Output is correct
5 Correct 7 ms 4984 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 8 ms 4984 KB Output is correct
8 Correct 8 ms 4984 KB Output is correct
9 Correct 8 ms 5112 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 8 ms 5112 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 8 ms 4984 KB Output is correct
14 Correct 8 ms 4984 KB Output is correct
15 Correct 8 ms 4984 KB Output is correct
16 Correct 8 ms 5016 KB Output is correct
17 Correct 8 ms 4984 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5112 KB Output is correct
2 Correct 7 ms 4984 KB Output is correct
3 Correct 8 ms 5112 KB Output is correct
4 Correct 7 ms 4984 KB Output is correct
5 Correct 7 ms 4984 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 8 ms 4984 KB Output is correct
8 Correct 8 ms 4984 KB Output is correct
9 Correct 8 ms 5112 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 8 ms 5112 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 8 ms 4984 KB Output is correct
14 Correct 8 ms 4984 KB Output is correct
15 Correct 8 ms 4984 KB Output is correct
16 Correct 8 ms 5016 KB Output is correct
17 Correct 8 ms 4984 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 8 ms 4984 KB Output is correct
20 Correct 8 ms 5112 KB Output is correct
21 Correct 10 ms 5112 KB Output is correct
22 Correct 10 ms 5112 KB Output is correct
23 Correct 9 ms 5112 KB Output is correct
24 Correct 9 ms 5240 KB Output is correct
25 Correct 10 ms 5244 KB Output is correct
26 Correct 9 ms 5240 KB Output is correct
27 Correct 8 ms 5112 KB Output is correct
28 Correct 10 ms 5240 KB Output is correct
29 Correct 10 ms 5240 KB Output is correct
30 Correct 10 ms 5240 KB Output is correct
31 Correct 10 ms 5240 KB Output is correct
32 Correct 10 ms 5240 KB Output is correct
33 Correct 11 ms 5244 KB Output is correct
34 Correct 12 ms 5116 KB Output is correct
35 Correct 10 ms 5240 KB Output is correct
36 Correct 9 ms 5240 KB Output is correct
37 Correct 10 ms 5240 KB Output is correct
38 Correct 10 ms 5240 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5112 KB Output is correct
2 Correct 7 ms 4984 KB Output is correct
3 Correct 8 ms 5112 KB Output is correct
4 Correct 7 ms 4984 KB Output is correct
5 Correct 7 ms 4984 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 8 ms 4984 KB Output is correct
8 Correct 8 ms 4984 KB Output is correct
9 Correct 8 ms 5112 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 8 ms 5112 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 8 ms 4984 KB Output is correct
14 Correct 8 ms 4984 KB Output is correct
15 Correct 8 ms 4984 KB Output is correct
16 Correct 8 ms 5016 KB Output is correct
17 Correct 8 ms 4984 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 336 ms 14648 KB Output is correct
20 Correct 347 ms 14704 KB Output is correct
21 Correct 329 ms 14580 KB Output is correct
22 Correct 312 ms 14708 KB Output is correct
23 Correct 350 ms 15088 KB Output is correct
24 Correct 177 ms 13816 KB Output is correct
25 Correct 276 ms 20588 KB Output is correct
26 Correct 152 ms 20332 KB Output is correct
27 Correct 403 ms 23032 KB Output is correct
28 Correct 1087 ms 48132 KB Output is correct
29 Correct 1087 ms 48100 KB Output is correct
30 Correct 399 ms 23032 KB Output is correct
31 Correct 392 ms 23032 KB Output is correct
32 Correct 465 ms 23068 KB Output is correct
33 Correct 693 ms 23664 KB Output is correct
34 Correct 1004 ms 36200 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 5112 KB Output is correct
2 Correct 7 ms 4984 KB Output is correct
3 Correct 8 ms 5112 KB Output is correct
4 Correct 7 ms 4984 KB Output is correct
5 Correct 7 ms 4984 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 8 ms 4984 KB Output is correct
8 Correct 8 ms 4984 KB Output is correct
9 Correct 8 ms 5112 KB Output is correct
10 Correct 7 ms 4984 KB Output is correct
11 Correct 8 ms 5112 KB Output is correct
12 Correct 8 ms 4984 KB Output is correct
13 Correct 8 ms 4984 KB Output is correct
14 Correct 8 ms 4984 KB Output is correct
15 Correct 8 ms 4984 KB Output is correct
16 Correct 8 ms 5016 KB Output is correct
17 Correct 8 ms 4984 KB Output is correct
18 Correct 8 ms 4984 KB Output is correct
19 Correct 8 ms 4984 KB Output is correct
20 Correct 8 ms 5112 KB Output is correct
21 Correct 10 ms 5112 KB Output is correct
22 Correct 10 ms 5112 KB Output is correct
23 Correct 9 ms 5112 KB Output is correct
24 Correct 9 ms 5240 KB Output is correct
25 Correct 10 ms 5244 KB Output is correct
26 Correct 9 ms 5240 KB Output is correct
27 Correct 8 ms 5112 KB Output is correct
28 Correct 10 ms 5240 KB Output is correct
29 Correct 10 ms 5240 KB Output is correct
30 Correct 10 ms 5240 KB Output is correct
31 Correct 10 ms 5240 KB Output is correct
32 Correct 10 ms 5240 KB Output is correct
33 Correct 11 ms 5244 KB Output is correct
34 Correct 12 ms 5116 KB Output is correct
35 Correct 10 ms 5240 KB Output is correct
36 Correct 9 ms 5240 KB Output is correct
37 Correct 10 ms 5240 KB Output is correct
38 Correct 10 ms 5240 KB Output is correct
39 Correct 336 ms 14648 KB Output is correct
40 Correct 347 ms 14704 KB Output is correct
41 Correct 329 ms 14580 KB Output is correct
42 Correct 312 ms 14708 KB Output is correct
43 Correct 350 ms 15088 KB Output is correct
44 Correct 177 ms 13816 KB Output is correct
45 Correct 276 ms 20588 KB Output is correct
46 Correct 152 ms 20332 KB Output is correct
47 Correct 403 ms 23032 KB Output is correct
48 Correct 1087 ms 48132 KB Output is correct
49 Correct 1087 ms 48100 KB Output is correct
50 Correct 399 ms 23032 KB Output is correct
51 Correct 392 ms 23032 KB Output is correct
52 Correct 465 ms 23068 KB Output is correct
53 Correct 693 ms 23664 KB Output is correct
54 Correct 1004 ms 36200 KB Output is correct
55 Correct 40 ms 6392 KB Output is correct
56 Correct 28 ms 6008 KB Output is correct
57 Correct 221 ms 14960 KB Output is correct
58 Correct 62 ms 12900 KB Output is correct
59 Correct 536 ms 29040 KB Output is correct
60 Correct 1504 ms 57316 KB Output is correct
61 Correct 507 ms 24824 KB Output is correct
62 Correct 473 ms 23288 KB Output is correct
63 Correct 550 ms 23288 KB Output is correct
64 Correct 1747 ms 36452 KB Output is correct
65 Correct 1038 ms 37092 KB Output is correct
66 Correct 1424 ms 48612 KB Output is correct
67 Correct 176 ms 22112 KB Output is correct
68 Correct 772 ms 39720 KB Output is correct
69 Correct 789 ms 39688 KB Output is correct
70 Correct 730 ms 38244 KB Output is correct