oj.uz

Submission #735124

# Submission time Handle Problem Language Result Execution time Memory
735124 2023-05-03T15:05:40 Z sandry24 Dreaming (IOI13_dreaming) C++17
32 / 100
 68 ms 15196 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
using namespace std;
 
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pi;
#define pb push_back
#define mp make_pair
#define f first
#define s second
 
vector<vector<pi>> adj(1e5+1);
vector<bool> visited(1e5+1);
vi parent(1e5+1), dists(1e5+1);
 
ll maxe = -1, maxnode = -1;
 
void dfs(ll x, ll p=-1, ll dist=0){
    visited[x] = 1;
    parent[x] = p;
    dists[x] = dist;
    if(dist > maxe){
        maxe = dist;
        maxnode = x;
    }
    for(auto i : adj[x]){
        if(i.f != p)
            dfs(i.f, x, dist + i.s);
    }
}
 
int travelTime(int N, int M, int L, int A[], int B[], int T[]){
    for(int i = 0; i < M; i++){
        adj[A[i]].pb({B[i], T[i]});
        adj[B[i]].pb({A[i], T[i]});
    }
    vector<pair<ll, ll>> centers;
    for(int i = 0; i < N; i++){
        if(!visited[i]){
            maxe = -1, maxnode = -1;
            dfs(i);
            ll n1 = maxnode;
            maxe = -1, maxnode = -1;
            dfs(n1);
            ll n2 = maxnode;
            vector<pair<ll, ll>> path;
            while(n2 != n1){
                path.pb({n2, dists[n2]});
                n2 = parent[n2];
            }
            path.pb({n2, dists[n2]});
            reverse(path.begin(), path.end());
            ll diameter = path.back().second;
            ll best_node = -1, best_dist = 1e18;
            for(int j = 0; j < path.size(); j++){
                if(max(path[j].s, diameter - path[j].s) < best_dist){
                    best_node = path[j].f;
                    best_dist = max(path[j].s, diameter - path[j].s);
                }
            }
            centers.pb({best_dist, best_node});
        }
    }
    sort(centers.begin(), centers.end(), greater<pair<ll, ll>>());
    for(int i = 1; i < centers.size(); i++){
        adj[centers[0].s].pb({centers[i].s, L});
        adj[centers[i].s].pb({centers[0].s, L});
    }
    dfs(0);
    maxe = -1;
    dfs(maxnode);
    return dists[maxnode];
}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:58:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |             for(int j = 0; j < path.size(); j++){
      |                            ~~^~~~~~~~~~~~~
dreaming.cpp:68:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i = 1; i < centers.size(); i++){
      |                    ~~^~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 15184 KB Output is correct
2 Correct 57 ms 15196 KB Output is correct
3 Correct 35 ms 10908 KB Output is correct
4 Correct 8 ms 5204 KB Output is correct
5 Correct 7 ms 4356 KB Output is correct
6 Correct 13 ms 6108 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 25 ms 7388 KB Output is correct
9 Correct 33 ms 9212 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 57 ms 10484 KB Output is correct
12 Correct 68 ms 13372 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Incorrect 2 ms 3412 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 15184 KB Output is correct
2 Correct 57 ms 15196 KB Output is correct
3 Correct 35 ms 10908 KB Output is correct
4 Correct 8 ms 5204 KB Output is correct
5 Correct 7 ms 4356 KB Output is correct
6 Correct 13 ms 6108 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 25 ms 7388 KB Output is correct
9 Correct 33 ms 9212 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 57 ms 10484 KB Output is correct
12 Correct 68 ms 13372 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct
16 Correct 2 ms 3412 KB Output is correct
17 Correct 2 ms 3412 KB Output is correct
18 Correct 2 ms 3412 KB Output is correct
19 Incorrect 2 ms 3412 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 8112 KB Output is correct
2 Correct 37 ms 8276 KB Output is correct
3 Correct 41 ms 8152 KB Output is correct
4 Correct 38 ms 8152 KB Output is correct
5 Correct 44 ms 8160 KB Output is correct
6 Correct 40 ms 8900 KB Output is correct
7 Correct 38 ms 8416 KB Output is correct
8 Correct 40 ms 8128 KB Output is correct
9 Correct 38 ms 8064 KB Output is correct
10 Correct 43 ms 8416 KB Output is correct
11 Correct 2 ms 3412 KB Output is correct
12 Correct 21 ms 8920 KB Output is correct
13 Correct 19 ms 8900 KB Output is correct
14 Correct 18 ms 8900 KB Output is correct
15 Correct 20 ms 9032 KB Output is correct
16 Correct 19 ms 8900 KB Output is correct
17 Correct 18 ms 8912 KB Output is correct
18 Correct 19 ms 8920 KB Output is correct
19 Correct 21 ms 8900 KB Output is correct
20 Correct 2 ms 3412 KB Output is correct
21 Correct 2 ms 3412 KB Output is correct
22 Correct 2 ms 3628 KB Output is correct
23 Correct 20 ms 8932 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 2 ms 3412 KB Output is correct
3 Correct 2 ms 3412 KB Output is correct
4 Correct 2 ms 3412 KB Output is correct
5 Correct 2 ms 3412 KB Output is correct
6 Incorrect 2 ms 3412 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 15184 KB Output is correct
2 Correct 57 ms 15196 KB Output is correct
3 Correct 35 ms 10908 KB Output is correct
4 Correct 8 ms 5204 KB Output is correct
5 Correct 7 ms 4356 KB Output is correct
6 Correct 13 ms 6108 KB Output is correct
7 Correct 2 ms 3412 KB Output is correct
8 Correct 25 ms 7388 KB Output is correct
9 Correct 33 ms 9212 KB Output is correct
10 Correct 2 ms 3540 KB Output is correct
11 Correct 57 ms 10484 KB Output is correct
12 Correct 68 ms 13372 KB Output is correct
13 Correct 2 ms 3540 KB Output is correct
14 Correct 2 ms 3412 KB Output is correct
15 Correct 2 ms 3412 KB Output is correct
16 Correct 2 ms 3412 KB Output is correct
17 Correct 2 ms 3412 KB Output is correct
18 Correct 2 ms 3412 KB Output is correct
19 Incorrect 2 ms 3412 KB Output isn't correct
20 Halted 0 ms 0 KB -