oj.uz

Submission #893107

# Submission time Handle Problem Language Result Execution time Memory
893107 2023-12-26T14:11:43 Z raul2008487 Dreaming (IOI13_dreaming) C++17
18 / 100
 49 ms 16140 KB 
#include<bits/stdc++.h>
#include "dreaming.h"
#define ll long long
#define pll pair<ll,ll>
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define all(v) v.begin(),v.end()
const int sz = 100005;
const ll inf = 1000000000000000;
using namespace std;
vector<pair<ll,ll>> adj[sz];
ll dis[sz][2], center, v1, v2, mx, cnt = -1;
bool used[sz];
vector<vector<ll>> path;
void trav(ll node){
    used[node] = 1;
    path[cnt].push_back(node);
    for(pll edge: adj[node]){
        if(!used[edge.fi]){
            trav(edge.fi);
        }
    }
}
void dfs(ll node, ll we, ll p){
    if(we > mx){
        v2 = node;
        mx = we;
    }
    for(pll edge: adj[node]){
        if(edge.fi != p){
            dfs(edge.fi, we + edge.se, node);
        }
    }
}
void caldis(ll node, ll we, ll p, ll type){
    dis[node][type] = we;
    for(pll edge: adj[node]){
        if(edge.fi != p){
            caldis(edge.fi, we + edge.se, node, type);
        }
    }
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    ll n = N, m = M, i, j;
    for(i=1;i<=m;i++){
        adj[A[i]].push_back({B[i], T[i]});
        adj[B[i]].push_back({A[i], T[i]});
    }
    for(i=0;i<n;i++){
        if(!used[i]){
            cnt++;
            path.push_back(vl(0));
            trav(i);
        }
    }
    multiset<ll> ms;
    ll res = -inf;
    for(i=0;i<=cnt;i++){
        mx = -inf, v1 = -1, v2 = -1;
        dfs(path[i][0], 0, -1);
        v1 = v2;
        mx = -inf;
        dfs(v1, 0, -1);
        caldis(v1, 0, -1, 0);caldis(v2, 0, -1, 1);  
        ll pc = path[i][0], pb = max(dis[pc][0], dis[pc][1]);
        for(auto x: path[i]){
            if(max(dis[x][0], dis[x][1]) < pb){
                pb = max(dis[x][0], dis[x][1]);
            }
        }
        ms.in(pb);
        res = max(res, mx);
        //ans = max(ans, pb);
    }
    if (cnt == 0) return max(res, *ms.begin());
    auto it = ms.end();
    it--;
    it--;
    auto it1 = it;
    it1--;
    if (cnt == 1) return max(res, *ms.rbegin() + *it + L);
    return max({res, *ms.rbegin() + *it + L, *it + *it1 + 2*L});
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:46:25: warning: unused variable 'j' [-Wunused-variable]
   46 |     ll n = N, m = M, i, j;
      |                         ^

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 49 ms 15312 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 5212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 49 ms 15312 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 29 ms 13832 KB Output is correct
2 Correct 28 ms 13840 KB Output is correct
3 Correct 29 ms 13760 KB Output is correct
4 Correct 32 ms 13828 KB Output is correct
5 Correct 29 ms 13832 KB Output is correct
6 Correct 31 ms 15616 KB Output is correct
7 Correct 31 ms 14152 KB Output is correct
8 Correct 30 ms 13728 KB Output is correct
9 Correct 28 ms 13440 KB Output is correct
10 Correct 28 ms 14140 KB Output is correct
11 Correct 1 ms 5464 KB Output is correct
12 Correct 20 ms 15628 KB Output is correct
13 Correct 21 ms 16140 KB Output is correct
14 Correct 21 ms 15884 KB Output is correct
15 Correct 20 ms 15624 KB Output is correct
16 Correct 21 ms 15536 KB Output is correct
17 Correct 21 ms 16140 KB Output is correct
18 Correct 21 ms 15520 KB Output is correct
19 Correct 21 ms 15624 KB Output is correct
20 Correct 1 ms 5212 KB Output is correct
21 Correct 1 ms 5212 KB Output is correct
22 Correct 2 ms 5724 KB Output is correct
23 Correct 20 ms 15628 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 5212 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 49 ms 15312 KB Output isn't correct
2 Halted 0 ms 0 KB -