oj.uz

Submission #881234

# Submission time Handle Problem Language Result Execution time Memory
881234 2023-11-30T23:07:21 Z CYhuang Race (IOI11_race) C++17
100 / 100
 276 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 14684 KB Output is correct
2 Correct 2 ms 14684 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 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 3 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 3 ms 14684 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 14800 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 14684 KB Output is correct
2 Correct 2 ms 14684 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 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 3 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 3 ms 14684 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 14800 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 3 ms 14684 KB Output is correct
20 Correct 2 ms 14684 KB Output is correct
21 Correct 3 ms 14684 KB Output is correct
22 Correct 3 ms 16988 KB Output is correct
23 Correct 3 ms 16860 KB Output is correct
24 Correct 4 ms 16732 KB Output is correct
25 Correct 3 ms 16732 KB Output is correct
26 Correct 3 ms 16732 KB Output is correct
27 Correct 4 ms 16732 KB Output is correct
28 Correct 3 ms 14684 KB Output is correct
29 Correct 4 ms 14860 KB Output is correct
30 Correct 3 ms 16732 KB Output is correct
31 Correct 3 ms 16732 KB Output is correct
32 Correct 4 ms 16860 KB Output is correct
33 Correct 4 ms 16908 KB Output is correct
34 Correct 3 ms 16984 KB Output is correct
35 Correct 4 ms 16732 KB Output is correct
36 Correct 4 ms 16984 KB Output is correct
37 Correct 4 ms 16728 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 14684 KB Output is correct
2 Correct 2 ms 14684 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 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 3 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 3 ms 14684 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 14800 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 84 ms 22484 KB Output is correct
20 Correct 76 ms 22100 KB Output is correct
21 Correct 79 ms 22572 KB Output is correct
22 Correct 73 ms 22864 KB Output is correct
23 Correct 53 ms 22360 KB Output is correct
24 Correct 40 ms 22108 KB Output is correct
25 Correct 84 ms 25684 KB Output is correct
26 Correct 76 ms 30276 KB Output is correct
27 Correct 136 ms 27472 KB Output is correct
28 Correct 178 ms 41808 KB Output is correct
29 Correct 165 ms 40816 KB Output is correct
30 Correct 110 ms 27800 KB Output is correct
31 Correct 121 ms 27496 KB Output is correct
32 Correct 126 ms 27416 KB Output is correct
33 Correct 137 ms 26360 KB Output is correct
34 Correct 111 ms 27224 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 14684 KB Output is correct
2 Correct 2 ms 14684 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 2 ms 14684 KB Output is correct
8 Correct 2 ms 14684 KB Output is correct
9 Correct 3 ms 14684 KB Output is correct
10 Correct 2 ms 14684 KB Output is correct
11 Correct 2 ms 14684 KB Output is correct
12 Correct 3 ms 14684 KB Output is correct
13 Correct 3 ms 14684 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 14800 KB Output is correct
18 Correct 2 ms 14684 KB Output is correct
19 Correct 3 ms 14684 KB Output is correct
20 Correct 2 ms 14684 KB Output is correct
21 Correct 3 ms 14684 KB Output is correct
22 Correct 3 ms 16988 KB Output is correct
23 Correct 3 ms 16860 KB Output is correct
24 Correct 4 ms 16732 KB Output is correct
25 Correct 3 ms 16732 KB Output is correct
26 Correct 3 ms 16732 KB Output is correct
27 Correct 4 ms 16732 KB Output is correct
28 Correct 3 ms 14684 KB Output is correct
29 Correct 4 ms 14860 KB Output is correct
30 Correct 3 ms 16732 KB Output is correct
31 Correct 3 ms 16732 KB Output is correct
32 Correct 4 ms 16860 KB Output is correct
33 Correct 4 ms 16908 KB Output is correct
34 Correct 3 ms 16984 KB Output is correct
35 Correct 4 ms 16732 KB Output is correct
36 Correct 4 ms 16984 KB Output is correct
37 Correct 4 ms 16728 KB Output is correct
38 Correct 3 ms 16732 KB Output is correct
39 Correct 84 ms 22484 KB Output is correct
40 Correct 76 ms 22100 KB Output is correct
41 Correct 79 ms 22572 KB Output is correct
42 Correct 73 ms 22864 KB Output is correct
43 Correct 53 ms 22360 KB Output is correct
44 Correct 40 ms 22108 KB Output is correct
45 Correct 84 ms 25684 KB Output is correct
46 Correct 76 ms 30276 KB Output is correct
47 Correct 136 ms 27472 KB Output is correct
48 Correct 178 ms 41808 KB Output is correct
49 Correct 165 ms 40816 KB Output is correct
50 Correct 110 ms 27800 KB Output is correct
51 Correct 121 ms 27496 KB Output is correct
52 Correct 126 ms 27416 KB Output is correct
53 Correct 137 ms 26360 KB Output is correct
54 Correct 111 ms 27224 KB Output is correct
55 Correct 10 ms 15192 KB Output is correct
56 Correct 9 ms 15452 KB Output is correct
57 Correct 59 ms 22964 KB Output is correct
58 Correct 31 ms 22728 KB Output is correct
59 Correct 74 ms 30268 KB Output is correct
60 Correct 251 ms 45532 KB Output is correct
61 Correct 117 ms 27844 KB Output is correct
62 Correct 147 ms 31720 KB Output is correct
63 Correct 146 ms 31176 KB Output is correct
64 Correct 276 ms 31632 KB Output is correct
65 Correct 113 ms 28356 KB Output is correct
66 Correct 234 ms 41040 KB Output is correct
67 Correct 74 ms 32492 KB Output is correct
68 Correct 169 ms 31944 KB Output is correct
69 Correct 173 ms 32196 KB Output is correct
70 Correct 147 ms 31428 KB Output is correct