oj.uz

Submission #228435

# Submission time Handle Problem Language Result Execution time Memory
228435 2020-05-01T02:46:42 Z mohamedsobhi777 Dreaming (IOI13_dreaming) C++14
18 / 100
 82 ms 20344 KB 
#include<bits/stdc++.h>
#include "dreaming.h"
 
using namespace std ; 
 
const int N = 1e5 + 7 ; 
 
int mn ; 
int vis[N] ; 
int mxx[N] ; 
int anss[N] ;  
 
vector<pair<int , int > > adj[N]; 
int node , dst ; 
int ansi , ans2;
 
int solve1(int x, int p){
    int ret = 0 ; 
    for(auto u : adj[x]){
        if(u.first==p)continue ; 
        int dfx = solve1(u.first , x) + u.second ; 
        ret = max(ret , dfx) ;
    }
    anss[x] = ret ; 
    return mxx[x] = ret ; 
}
 
int dfs1(int x, int p , int dp = 0 ){
    vis[x] ++ ; 
    anss[x] = max(anss[x] , dp ) ;
    ansi = min(ansi , anss[x]) ; 
    ans2 = max(ans2 , anss[x]) ; 
    vector<int> dps , pre , suf; 
    for(auto u : adj[x]){
        if(u.first == p)continue ; 
        dps.push_back(mxx[u.first] + u.second) ;
        int mx = pre.size() ? pre.back() : 0 ; 
        pre.push_back(max(mx , dps.back())) ; 
    }  
    suf.resize(pre.size()) ;
    if(suf.size())
    suf[suf.size()-1] = dps[suf.size()-1] ; 
    for(int i = suf.size() -2 ; i >=0 ;i --){
        suf[i] = max(dps[i] , suf[i+1]) ; 
    }
    int i = 0 ; 
    for(auto u : adj[x]){
        if(u.first==p)continue ;
        int subdp = 0 ;
        if(i) subdp = max(subdp , pre[i-1]) ; 
        if(i < suf.size() -1 ) subdp = max(subdp , suf[i+1]) ; 
        dfs1(u.first , x , max(dp , subdp) + u.second) ; 
        i++; 
    } 
}
 
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    for(int i  =0 ; i< M ;i++){
        adj[A[i] +1 ].push_back({B[i]+1 , T[i]}) ;
        adj[B[i]+1].push_back({A[i]+1 , T[i]}) ;
    }
    vector<int> v; 
    multiset<int> mul ; 
    for(int i = 1; i <=N ; i++){
        if(vis[i])continue ; 
        ansi = 2e9 ; 
        solve1(i , i ) ; 
        dfs1(i , i) ;
        v.push_back(ansi) ; 
        mul.insert(ansi) ;
    }
    if(v.size() == 1)return ans2 ; 
    else if(v.size() ==2 )return v[0] + v[1]  + L  ; 
 
    int s = v.size() ; 
    int ans = 2e9 ; 
 
    for(auto u : v){
        mul.erase(mul.find(u)) ; 
        int mx1 = -1 , mx2 = -1 ; 
        auto e = mul.end() ;
        e-- ; mx1 = *e ; 
        e-- ; mx2 = *e ;
        int now = max(u + mx1 + L , mx1 + mx2 + L + L ) ; 
        ans = min(ans , now ) ;
        mul.insert(u) ; 
    }   
    return ans ; 
}

Compilation message

dreaming.cpp: In function 'int dfs1(int, int, int)':
dreaming.cpp:51:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(i < suf.size() -1 ) subdp = max(subdp , suf[i+1]) ; 
            ~~^~~~~~~~~~~~~~~
dreaming.cpp:55:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:75:9: warning: unused variable 's' [-Wunused-variable]
     int s = v.size() ; 
         ^

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 20344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 20344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 20344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 9332 KB Output is correct
2 Correct 62 ms 9332 KB Output is correct
3 Correct 57 ms 9332 KB Output is correct
4 Correct 59 ms 9332 KB Output is correct
5 Correct 59 ms 9204 KB Output is correct
6 Correct 65 ms 9980 KB Output is correct
7 Correct 61 ms 9588 KB Output is correct
8 Correct 57 ms 9204 KB Output is correct
9 Correct 60 ms 9076 KB Output is correct
10 Correct 65 ms 9460 KB Output is correct
11 Correct 6 ms 2688 KB Output is correct
12 Correct 43 ms 8952 KB Output is correct
13 Correct 45 ms 9208 KB Output is correct
14 Correct 41 ms 8952 KB Output is correct
15 Correct 41 ms 8952 KB Output is correct
16 Correct 43 ms 8952 KB Output is correct
17 Correct 47 ms 8952 KB Output is correct
18 Correct 42 ms 8944 KB Output is correct
19 Correct 43 ms 8952 KB Output is correct
20 Correct 6 ms 2688 KB Output is correct
21 Correct 6 ms 2688 KB Output is correct
22 Correct 7 ms 2816 KB Output is correct
23 Correct 40 ms 8952 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 20344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 20344 KB Output isn't correct
2 Halted 0 ms 0 KB -