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답안 #314754

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
314754 2020-10-21T04:27:35 Z jaaguptamme 경주 (Race) (IOI11_race) C++14
100 / 100
 537 ms 134648 KB 
#include <bits/stdc++.h>
#define int long long
#define ll long long
#define pii pair<ll,ll>
#include "race.h"
using namespace std;
const ll CN=1000005;
vector<pii>g[CN];
map<ll,ll>*mp[CN];
ll dist[CN],sz[CN],dep[CN];
ll res=INT_MAX;
ll k;
void dfs(ll u,ll prev){
    sz[u]=1;
    ll mxsz=-1,mxn=-1;
    for(auto el:g[u]){
        ll v=el.first;
        ll c=el.second;
        if(v==prev)continue;
        dist[v]=dist[u]+c;
        dep[v]=dep[u]+1;
        dfs(v,u);
        sz[u]+=sz[v];
        if(sz[v]>mxsz){
            mxsz=sz[v];
            mxn=v;
        }
    }
    if(mxsz!=-1)mp[u]=mp[mxn];
    else mp[u]=new map<ll,ll>();
    if((*mp[u]).count(dist[u]))(*mp[u])[dist[u]]=min((*mp[u])[dist[u]],dep[u]);
    else (*mp[u])[dist[u]]=dep[u];
    for(auto E:g[u]){
        ll v=E.first;
        if(v==prev ||v==mxn)continue;
        for(auto el:(*mp[v])){
            ll nx=el.first;
             ll de=el.second;
             if((*mp[u]).count(k-nx+2*dist[u])){
                ll node=(*mp[u])[k-nx+2*dist[u]];
                res=min(res,abs(de-dep[u])+abs(dep[u]-node));
               // cout<<"CHANGE"<<nx<<' '<<k<<' '<<de<<' '<<res<<'\n';
             }
        }
        for(auto el:(*mp[v])){
            ll nx=el.first;
             ll de=el.second;
             if((*mp[u]).count(nx)){
                 (*mp[u])[nx]=min((*mp[u])[nx],de);
             }else  (*mp[u])[nx]=de;
        }
    }
    /*
    cout<<"NODE";
    cout<<u<<' '<<prev<<' '<<dist[u]<<' '<<dep[u]<<'\n';
    for(auto el:(*mp[u]))cout<<el.first<<' '<<el.second<<'\n';
    */
    if((*mp[u]).count(k+dist[u])){
        ll node=(*mp[u])[k+dist[u]];
        //cout<<"CHANG"<<k-dist[u]<<' '<<node<<' '<<dep[u]<<' '<<u<<'\n';
        res=min(res,abs(node-dep[u]));
    }
}
int32_t best_path(int32_t N, int32_t K, int32_t H[][2], int32_t L[])
{
    k=K;
    for(int i=0;i<N-1;i++){
        ll u,v,c;u=H[i][0];
        v=H[i][1];
        c=L[i];
        g[u].push_back({v,c});
        g[v].push_back({u,c});
    }
    for(int i=0;i<CN;i++){
        dep[i]=0;
        dist[i]=0;
        sz[i]=0;
    }
    dep[1]=0;
    dfs(1,N);
    int ans=res;
    if(ans<=N)return ans;
    else return -1;
}
/*
int main(){
    int n=4;
    int k=7;
    int h[][2]={{0,1},{1,2},{1,3}};
    int l[]={1,2,4};
    std::cout<<best_path(n,k,h,l)<<'\n';
}
*/
/*
int main(){
    int n=11;
    int k=12;
    int h[][2]={{0,1},{0,2},{2,3},{3,4},{4,5},{0,6},{6,7},{6,8},{8,9},{8,10}};
    int l[]={3,4,5,4,6,3,2,5,6,7};
    cout<<best_path(n,k,h,l)<<'\n';
}
*/

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 47352 KB Output is correct
2 Correct 28 ms 47360 KB Output is correct
3 Correct 28 ms 47360 KB Output is correct
4 Correct 28 ms 47360 KB Output is correct
5 Correct 29 ms 47360 KB Output is correct
6 Correct 29 ms 47268 KB Output is correct
7 Correct 30 ms 47352 KB Output is correct
8 Correct 29 ms 47360 KB Output is correct
9 Correct 28 ms 47360 KB Output is correct
10 Correct 28 ms 47360 KB Output is correct
11 Correct 28 ms 47352 KB Output is correct
12 Correct 29 ms 47488 KB Output is correct
13 Correct 28 ms 47360 KB Output is correct
14 Correct 28 ms 47352 KB Output is correct
15 Correct 28 ms 47352 KB Output is correct
16 Correct 28 ms 47360 KB Output is correct
17 Correct 28 ms 47360 KB Output is correct
18 Correct 28 ms 47352 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 47352 KB Output is correct
2 Correct 28 ms 47360 KB Output is correct
3 Correct 28 ms 47360 KB Output is correct
4 Correct 28 ms 47360 KB Output is correct
5 Correct 29 ms 47360 KB Output is correct
6 Correct 29 ms 47268 KB Output is correct
7 Correct 30 ms 47352 KB Output is correct
8 Correct 29 ms 47360 KB Output is correct
9 Correct 28 ms 47360 KB Output is correct
10 Correct 28 ms 47360 KB Output is correct
11 Correct 28 ms 47352 KB Output is correct
12 Correct 29 ms 47488 KB Output is correct
13 Correct 28 ms 47360 KB Output is correct
14 Correct 28 ms 47352 KB Output is correct
15 Correct 28 ms 47352 KB Output is correct
16 Correct 28 ms 47360 KB Output is correct
17 Correct 28 ms 47360 KB Output is correct
18 Correct 28 ms 47352 KB Output is correct
19 Correct 29 ms 47360 KB Output is correct
20 Correct 29 ms 47276 KB Output is correct
21 Correct 30 ms 47608 KB Output is correct
22 Correct 30 ms 47616 KB Output is correct
23 Correct 30 ms 47616 KB Output is correct
24 Correct 30 ms 47616 KB Output is correct
25 Correct 30 ms 47608 KB Output is correct
26 Correct 29 ms 47616 KB Output is correct
27 Correct 29 ms 47480 KB Output is correct
28 Correct 30 ms 47616 KB Output is correct
29 Correct 30 ms 47608 KB Output is correct
30 Correct 29 ms 47616 KB Output is correct
31 Correct 29 ms 47608 KB Output is correct
32 Correct 29 ms 47616 KB Output is correct
33 Correct 30 ms 47608 KB Output is correct
34 Correct 29 ms 47488 KB Output is correct
35 Correct 29 ms 47480 KB Output is correct
36 Correct 29 ms 47488 KB Output is correct
37 Correct 29 ms 47480 KB Output is correct
38 Correct 30 ms 47480 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 47352 KB Output is correct
2 Correct 28 ms 47360 KB Output is correct
3 Correct 28 ms 47360 KB Output is correct
4 Correct 28 ms 47360 KB Output is correct
5 Correct 29 ms 47360 KB Output is correct
6 Correct 29 ms 47268 KB Output is correct
7 Correct 30 ms 47352 KB Output is correct
8 Correct 29 ms 47360 KB Output is correct
9 Correct 28 ms 47360 KB Output is correct
10 Correct 28 ms 47360 KB Output is correct
11 Correct 28 ms 47352 KB Output is correct
12 Correct 29 ms 47488 KB Output is correct
13 Correct 28 ms 47360 KB Output is correct
14 Correct 28 ms 47352 KB Output is correct
15 Correct 28 ms 47352 KB Output is correct
16 Correct 28 ms 47360 KB Output is correct
17 Correct 28 ms 47360 KB Output is correct
18 Correct 28 ms 47352 KB Output is correct
19 Correct 157 ms 68128 KB Output is correct
20 Correct 159 ms 69368 KB Output is correct
21 Correct 159 ms 69496 KB Output is correct
22 Correct 170 ms 70136 KB Output is correct
23 Correct 203 ms 83832 KB Output is correct
24 Correct 171 ms 78072 KB Output is correct
25 Correct 142 ms 70136 KB Output is correct
26 Correct 89 ms 70904 KB Output is correct
27 Correct 264 ms 83832 KB Output is correct
28 Correct 322 ms 106488 KB Output is correct
29 Correct 341 ms 99832 KB Output is correct
30 Correct 262 ms 83980 KB Output is correct
31 Correct 258 ms 83960 KB Output is correct
32 Correct 305 ms 84088 KB Output is correct
33 Correct 279 ms 76408 KB Output is correct
34 Correct 414 ms 110328 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 47352 KB Output is correct
2 Correct 28 ms 47360 KB Output is correct
3 Correct 28 ms 47360 KB Output is correct
4 Correct 28 ms 47360 KB Output is correct
5 Correct 29 ms 47360 KB Output is correct
6 Correct 29 ms 47268 KB Output is correct
7 Correct 30 ms 47352 KB Output is correct
8 Correct 29 ms 47360 KB Output is correct
9 Correct 28 ms 47360 KB Output is correct
10 Correct 28 ms 47360 KB Output is correct
11 Correct 28 ms 47352 KB Output is correct
12 Correct 29 ms 47488 KB Output is correct
13 Correct 28 ms 47360 KB Output is correct
14 Correct 28 ms 47352 KB Output is correct
15 Correct 28 ms 47352 KB Output is correct
16 Correct 28 ms 47360 KB Output is correct
17 Correct 28 ms 47360 KB Output is correct
18 Correct 28 ms 47352 KB Output is correct
19 Correct 29 ms 47360 KB Output is correct
20 Correct 29 ms 47276 KB Output is correct
21 Correct 30 ms 47608 KB Output is correct
22 Correct 30 ms 47616 KB Output is correct
23 Correct 30 ms 47616 KB Output is correct
24 Correct 30 ms 47616 KB Output is correct
25 Correct 30 ms 47608 KB Output is correct
26 Correct 29 ms 47616 KB Output is correct
27 Correct 29 ms 47480 KB Output is correct
28 Correct 30 ms 47616 KB Output is correct
29 Correct 30 ms 47608 KB Output is correct
30 Correct 29 ms 47616 KB Output is correct
31 Correct 29 ms 47608 KB Output is correct
32 Correct 29 ms 47616 KB Output is correct
33 Correct 30 ms 47608 KB Output is correct
34 Correct 29 ms 47488 KB Output is correct
35 Correct 29 ms 47480 KB Output is correct
36 Correct 29 ms 47488 KB Output is correct
37 Correct 29 ms 47480 KB Output is correct
38 Correct 30 ms 47480 KB Output is correct
39 Correct 157 ms 68128 KB Output is correct
40 Correct 159 ms 69368 KB Output is correct
41 Correct 159 ms 69496 KB Output is correct
42 Correct 170 ms 70136 KB Output is correct
43 Correct 203 ms 83832 KB Output is correct
44 Correct 171 ms 78072 KB Output is correct
45 Correct 142 ms 70136 KB Output is correct
46 Correct 89 ms 70904 KB Output is correct
47 Correct 264 ms 83832 KB Output is correct
48 Correct 322 ms 106488 KB Output is correct
49 Correct 341 ms 99832 KB Output is correct
50 Correct 262 ms 83980 KB Output is correct
51 Correct 258 ms 83960 KB Output is correct
52 Correct 305 ms 84088 KB Output is correct
53 Correct 279 ms 76408 KB Output is correct
54 Correct 414 ms 110328 KB Output is correct
55 Correct 45 ms 50740 KB Output is correct
56 Correct 39 ms 49144 KB Output is correct
57 Correct 104 ms 68856 KB Output is correct
58 Correct 100 ms 67540 KB Output is correct
59 Correct 119 ms 77248 KB Output is correct
60 Correct 333 ms 97400 KB Output is correct
61 Correct 294 ms 87416 KB Output is correct
62 Correct 256 ms 84088 KB Output is correct
63 Correct 302 ms 83960 KB Output is correct
64 Correct 537 ms 134264 KB Output is correct
65 Correct 535 ms 134648 KB Output is correct
66 Correct 325 ms 104696 KB Output is correct
67 Correct 246 ms 88928 KB Output is correct
68 Correct 405 ms 104056 KB Output is correct
69 Correct 404 ms 104696 KB Output is correct
70 Correct 384 ms 101624 KB Output is correct