oj.uz

Submission #873962

# Submission time Handle Problem Language Result Execution time Memory
873962 2023-11-16T06:05:06 Z CYhuang Race (IOI11_race) C++17
100 / 100
 241 ms 45532 KB 
#include "race.h"
#include<bits/stdc++.h>
using namespace std;

#define For(i,a,b) for(int i=a;i<=b;i++)

typedef pair<int,int> pii;

typedef vector<int> vi;
#define pb push_back
const int Size=2e5;
const int Maxn=1e6;
const int INF=1<<20;
int ans;
int dp[Maxn+20],sz[Size+20],cnt[Maxn+20];
vector<pii> adj[Size+20];
bitset<Size+20> vis;
void dfs_sz(int u,int pa){
    sz[u]=1;
    for(auto [v,w]:adj[u]){
        if(v==pa||vis[v])   continue;
        dfs_sz(v,u);
        sz[u]+=sz[v];
    }
}
int dfs_cen(int u,int pa,int tot_sz){
    for(auto [v,w]:adj[u]){
        if(v==pa||vis[v])   continue;
        if(sz[v]>(tot_sz>>1))   return dfs_cen(v,u,tot_sz);
    }
    return u;
}
void get_path(int u,int pa,int len,int dep,vi &vec,int K){
    if(len>K)   return ;
    cnt[len]=min(cnt[len],dep);
    ans=min(ans,dp[K-len]+cnt[len]);
    vec.pb(len);
    for(auto [v,w]:adj[u]){
        if(v==pa||vis[v])   continue;
        get_path(v,u,len+w,dep+1,vec,K);
    }
}
void c_d(int rt,int K){
    dfs_sz(rt,rt);
    int centroid=dfs_cen(rt,rt,sz[rt]);
    vis[centroid]=true;
    vi vec;
    for(auto [v,w]:adj[centroid]){
        if(vis[v])  continue;
        vi vec2;
        get_path(v,centroid,w,1,vec2,K);
        for(auto i:vec2){
            dp[i]=min(dp[i],cnt[i]);
            vec.pb(i);
        }
        for(auto i:vec2)    cnt[i]=INF;
    }
    for(auto i:vec) dp[i]=INF;
    for(auto [v,w]:adj[centroid]){
        if(vis[v])  continue;
        c_d(v,K);
    }
}
int best_path(int N, int K, int H[][2], int L[])
{
    For(i,0,N-2){
        int u=H[i][0],v=H[i][1],w=L[i];
        u++,v++;
        adj[u].pb({v,w});
        adj[v].pb({u,w});
    }
    ans=INF;
    For(i,1,K)  dp[i]=cnt[i]=INF;
    c_d(1,K);
    return (ans==INF?-1:ans);
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14804 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 3 ms 14824 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14780 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14796 KB Output is correct
14 Correct 2 ms 14684 KB Output is correct
15 Correct 2 ms 14684 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Correct 2 ms 14796 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14804 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 3 ms 14824 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14780 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14796 KB Output is correct
14 Correct 2 ms 14684 KB Output is correct
15 Correct 2 ms 14684 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Correct 2 ms 14796 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 2 ms 14936 KB Output is correct
20 Correct 2 ms 14680 KB Output is correct
21 Correct 3 ms 14684 KB Output is correct
22 Correct 4 ms 16988 KB Output is correct
23 Correct 3 ms 16732 KB Output is correct
24 Correct 3 ms 16732 KB Output is correct
25 Correct 3 ms 16908 KB Output is correct
26 Correct 3 ms 16856 KB Output is correct
27 Correct 3 ms 16732 KB Output is correct
28 Correct 3 ms 14684 KB Output is correct
29 Correct 4 ms 14684 KB Output is correct
30 Correct 3 ms 16732 KB Output is correct
31 Correct 4 ms 16912 KB Output is correct
32 Correct 4 ms 16728 KB Output is correct
33 Correct 3 ms 16728 KB Output is correct
34 Correct 3 ms 16728 KB Output is correct
35 Correct 3 ms 16732 KB Output is correct
36 Correct 3 ms 17112 KB Output is correct
37 Correct 4 ms 16896 KB Output is correct
38 Correct 3 ms 16732 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14804 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 3 ms 14824 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14780 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14796 KB Output is correct
14 Correct 2 ms 14684 KB Output is correct
15 Correct 2 ms 14684 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Correct 2 ms 14796 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 74 ms 22100 KB Output is correct
20 Correct 73 ms 22172 KB Output is correct
21 Correct 78 ms 22452 KB Output is correct
22 Correct 71 ms 23020 KB Output is correct
23 Correct 58 ms 22364 KB Output is correct
24 Correct 42 ms 22096 KB Output is correct
25 Correct 82 ms 25576 KB Output is correct
26 Correct 74 ms 30276 KB Output is correct
27 Correct 106 ms 27476 KB Output is correct
28 Correct 161 ms 41808 KB Output is correct
29 Correct 174 ms 40788 KB Output is correct
30 Correct 112 ms 27344 KB Output is correct
31 Correct 130 ms 27624 KB Output is correct
32 Correct 123 ms 27644 KB Output is correct
33 Correct 131 ms 26196 KB Output is correct
34 Correct 104 ms 27220 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14680 KB Output is correct
2 Correct 2 ms 14804 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 3 ms 14684 KB Output is correct
7 Correct 3 ms 14824 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 2 ms 14684 KB Output is correct
10 Correct 2 ms 14780 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14796 KB Output is correct
14 Correct 2 ms 14684 KB Output is correct
15 Correct 2 ms 14684 KB Output is correct
16 Correct 2 ms 14684 KB Output is correct
17 Correct 2 ms 14796 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 2 ms 14936 KB Output is correct
20 Correct 2 ms 14680 KB Output is correct
21 Correct 3 ms 14684 KB Output is correct
22 Correct 4 ms 16988 KB Output is correct
23 Correct 3 ms 16732 KB Output is correct
24 Correct 3 ms 16732 KB Output is correct
25 Correct 3 ms 16908 KB Output is correct
26 Correct 3 ms 16856 KB Output is correct
27 Correct 3 ms 16732 KB Output is correct
28 Correct 3 ms 14684 KB Output is correct
29 Correct 4 ms 14684 KB Output is correct
30 Correct 3 ms 16732 KB Output is correct
31 Correct 4 ms 16912 KB Output is correct
32 Correct 4 ms 16728 KB Output is correct
33 Correct 3 ms 16728 KB Output is correct
34 Correct 3 ms 16728 KB Output is correct
35 Correct 3 ms 16732 KB Output is correct
36 Correct 3 ms 17112 KB Output is correct
37 Correct 4 ms 16896 KB Output is correct
38 Correct 3 ms 16732 KB Output is correct
39 Correct 74 ms 22100 KB Output is correct
40 Correct 73 ms 22172 KB Output is correct
41 Correct 78 ms 22452 KB Output is correct
42 Correct 71 ms 23020 KB Output is correct
43 Correct 58 ms 22364 KB Output is correct
44 Correct 42 ms 22096 KB Output is correct
45 Correct 82 ms 25576 KB Output is correct
46 Correct 74 ms 30276 KB Output is correct
47 Correct 106 ms 27476 KB Output is correct
48 Correct 161 ms 41808 KB Output is correct
49 Correct 174 ms 40788 KB Output is correct
50 Correct 112 ms 27344 KB Output is correct
51 Correct 130 ms 27624 KB Output is correct
52 Correct 123 ms 27644 KB Output is correct
53 Correct 131 ms 26196 KB Output is correct
54 Correct 104 ms 27220 KB Output is correct
55 Correct 8 ms 15196 KB Output is correct
56 Correct 9 ms 15468 KB Output is correct
57 Correct 62 ms 22956 KB Output is correct
58 Correct 31 ms 22780 KB Output is correct
59 Correct 73 ms 30304 KB Output is correct
60 Correct 241 ms 45532 KB Output is correct
61 Correct 127 ms 27988 KB Output is correct
62 Correct 122 ms 31208 KB Output is correct
63 Correct 142 ms 31188 KB Output is correct
64 Correct 212 ms 31684 KB Output is correct
65 Correct 104 ms 28240 KB Output is correct
66 Correct 227 ms 41040 KB Output is correct
67 Correct 84 ms 32632 KB Output is correct
68 Correct 161 ms 32460 KB Output is correct
69 Correct 158 ms 32204 KB Output is correct
70 Correct 137 ms 31428 KB Output is correct