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Submission #290106

# Submission time Handle Problem Language Result Execution time Memory
290106 2020-09-03T12:11:17 Z REALITYNB Race (IOI11_race) C++14
9 / 100
 3000 ms 35532 KB 
#include <bits/stdc++.h> 
#include "race.h"
#define pb push_back
#define mp make_pair
#define pii pair<int,int> 
#define F first 
#define S second 
using namespace std; 
int n , k ; 
const int mxn = 2e5+1 ;
vector<pii> adj[mxn] ; 
vector<int> sz(mxn) , w(mxn) ,h(mxn) ; 
void sub(int a , int p){
    sz[a]=1 ; 
    if(p!=-1) h[a]=h[p]+1 ; 
    for(pii& x : adj[a]){
        if(x.F==p) continue ; 
        w[x.F]=w[a]+x.S ;         
        sub(x.F,a) ; 
        sz[a]+=sz[x.F] ; 
    }
}
int mn  = 1e9 ; 
vector<int> p[mxn] ; 
map<int,multiset<int>> cnt ; 
void dfs(int a , int pp , int keep){
    int bigchild = -1 , mx = -1 ; 
    for(pii& y : adj[a]){
        int x = y.F ; 
        if(x==pp) continue ; 
        if(sz[x]>mx){
            mx=sz[x] ; 
            bigchild= x ; 
        }
    }
    for(pii& y : adj[a]){
        int x = y.F ; 
        if(x==pp||x==bigchild) continue ; 
        dfs(x,a,0) ; 
    }
    if(bigchild!=-1){
        dfs(bigchild,a,1) ; 
     //   p[bigchild].swap(p[a]) ; 
    }
    p[a].push_back(a) ; 
    int target = k+2*w[a] ; 
    if(cnt.count(target-w[a])) mn = min(mn,*(cnt[target-w[a]].begin())-h[a]) ; 
    cnt[w[a]].insert(h[a]) ; 
    for(pii& y : adj[a]){
        if(y.F==pp||y.F==bigchild) continue ; 
        for(int& x : p[y.F]){
            if(cnt.count(target-w[x])) mn = min(*(cnt[target-w[x]].begin())+h[x]-h[a]*2,mn) ; 
            p[a].pb(x) ; 
        }
        for(int& x :p[y.F]) cnt[w[a]].insert(h[x]) ; 
    }
    if(keep==0){
        for(int& x: p[a]){
            cnt[w[x]].erase(cnt[w[x]].find(h[x])) ;
            if(cnt[w[x]].empty()) cnt.erase(cnt.find(w[x])) ;  
        }
    }
}
int solve(){
    sub(1,-1) ; 
    dfs(1,-1,1) ; 
    if(mn==1e9) return -1; 
    return mn ; 
}
int best_path(int N , int K , int H[][2] , int L[]){
    n = N ; 
    k = K ; 
    for(int i=0;i<n;i++){
        adj[H[i][0]].push_back(mp(H[i][1],L[i]));
        adj[H[i][1]].push_back(mp(H[i][0],L[i])) ;  
    }
    return solve() ; 
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 12160 KB Output is correct
2 Correct 8 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 8 ms 12160 KB Output is correct
5 Correct 8 ms 12160 KB Output is correct
6 Correct 10 ms 12160 KB Output is correct
7 Correct 8 ms 12160 KB Output is correct
8 Correct 9 ms 12160 KB Output is correct
9 Correct 9 ms 12160 KB Output is correct
10 Correct 9 ms 12160 KB Output is correct
11 Correct 8 ms 12160 KB Output is correct
12 Correct 8 ms 12160 KB Output is correct
13 Correct 9 ms 12160 KB Output is correct
14 Correct 9 ms 12160 KB Output is correct
15 Correct 9 ms 12160 KB Output is correct
16 Correct 10 ms 12160 KB Output is correct
17 Correct 9 ms 12160 KB Output is correct
18 Correct 9 ms 12160 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 12160 KB Output is correct
2 Correct 8 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 8 ms 12160 KB Output is correct
5 Correct 8 ms 12160 KB Output is correct
6 Correct 10 ms 12160 KB Output is correct
7 Correct 8 ms 12160 KB Output is correct
8 Correct 9 ms 12160 KB Output is correct
9 Correct 9 ms 12160 KB Output is correct
10 Correct 9 ms 12160 KB Output is correct
11 Correct 8 ms 12160 KB Output is correct
12 Correct 8 ms 12160 KB Output is correct
13 Correct 9 ms 12160 KB Output is correct
14 Correct 9 ms 12160 KB Output is correct
15 Correct 9 ms 12160 KB Output is correct
16 Correct 10 ms 12160 KB Output is correct
17 Correct 9 ms 12160 KB Output is correct
18 Correct 9 ms 12160 KB Output is correct
19 Execution timed out 3048 ms 12032 KB Time limit exceeded
20 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 12160 KB Output is correct
2 Correct 8 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 8 ms 12160 KB Output is correct
5 Correct 8 ms 12160 KB Output is correct
6 Correct 10 ms 12160 KB Output is correct
7 Correct 8 ms 12160 KB Output is correct
8 Correct 9 ms 12160 KB Output is correct
9 Correct 9 ms 12160 KB Output is correct
10 Correct 9 ms 12160 KB Output is correct
11 Correct 8 ms 12160 KB Output is correct
12 Correct 8 ms 12160 KB Output is correct
13 Correct 9 ms 12160 KB Output is correct
14 Correct 9 ms 12160 KB Output is correct
15 Correct 9 ms 12160 KB Output is correct
16 Correct 10 ms 12160 KB Output is correct
17 Correct 9 ms 12160 KB Output is correct
18 Correct 9 ms 12160 KB Output is correct
19 Runtime error 114 ms 35532 KB Execution killed with signal 11
20 Halted 0 ms 0 KB -

Subtask #4
0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 12160 KB Output is correct
2 Correct 8 ms 12160 KB Output is correct
3 Correct 9 ms 12160 KB Output is correct
4 Correct 8 ms 12160 KB Output is correct
5 Correct 8 ms 12160 KB Output is correct
6 Correct 10 ms 12160 KB Output is correct
7 Correct 8 ms 12160 KB Output is correct
8 Correct 9 ms 12160 KB Output is correct
9 Correct 9 ms 12160 KB Output is correct
10 Correct 9 ms 12160 KB Output is correct
11 Correct 8 ms 12160 KB Output is correct
12 Correct 8 ms 12160 KB Output is correct
13 Correct 9 ms 12160 KB Output is correct
14 Correct 9 ms 12160 KB Output is correct
15 Correct 9 ms 12160 KB Output is correct
16 Correct 10 ms 12160 KB Output is correct
17 Correct 9 ms 12160 KB Output is correct
18 Correct 9 ms 12160 KB Output is correct
19 Execution timed out 3048 ms 12032 KB Time limit exceeded
20 Halted 0 ms 0 KB -