oj.uz

Submission #942391

# Submission time Handle Problem Language Result Execution time Memory
942391 2024-03-10T14:56:37 Z emad234 Dreaming (IOI13_dreaming) C++17
0 / 100
 43 ms 19792 KB 
#include <bits/stdc++.h>
#include "dreaming.h"
#define ll long long
#define F first
#define S second
#define pii pair<int,int>
const int mod = 1e9 + 7;
const int mxN = 2e5 + 5;
using namespace std;
vector<vector<pii>>v;
vector<int>nums;
int mx[mxN];
bool vis[mxN];
int path;
int dpD[mxN],dpU[mxN];
void dfs(int u){
    vis[u] = 1;
    for(auto x : v[u]){
        if(vis[x.F]) continue;
        dfs(x.F);
        dpD[u] = max(dpD[x.F] + x.S,dpD[u]);
    }
}
void hfs(int u,int par){
    multiset<int>s;
    for(auto x : v[u]){
        if(x.F == par) continue;
        s.insert(dpD[x.F] + x.S);
    }
    for(auto x : v[u]){
        if(x.F == par) continue; 
        dpU[x.F] = dpU[u] + x.S;
        s.erase(s.find(dpD[x.F] + x.S));
        if(s.size()) dpU[x.F] = max(dpU[x.F], *(s.rbegin()) + x.S);
        s.insert(dpD[x.F] + x.S);
    }
    for(auto x : v[u]) if(x.F != par) hfs(x.F,u);
    path = min(path,max(dpD[u],dpU[u]));
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
    v.resize(N + 2);
    for(int i = 0;i < M;i++){
        v[A[i]].push_back({B[i],T[i]});
        v[B[i]].push_back({A[i],T[i]});
    }
    int mx = 0;
    for(int i = 0;i < N;i++){
        if(!vis[i]){
            path = 2e9;
            dfs(i);
            hfs(i,-1);
            if(path > mx){
                if(i)
                    nums.push_back(mx + L);
                mx = path;
            } else nums.push_back(path + L);
        }
    }
    sort(nums.begin(),nums.end());
    // for(auto x : nums) cout<<x<<' ';
    // cout<<'\n';
    int ans = mx;
    for(int i = 0;i < nums.size();i++){
        int num = 0;
        if(i == nums.size() - 1){
            if(i != 0){
                num = nums[i] + nums[i - 1];
            }
        } else num = nums[i] + nums[nums.size() - 1];
        num = max(num, nums[i] + mx);
        ans = max(num,ans);
    }
    return ans;
}

// #define MAX_N 100000

// static int A[MAX_N];
// static int B[MAX_N];
// static int T[MAX_N];

// int main() {
// 	int N, M, L, i;
// 	int res;
// 	cin >>N>>M>>L;
// 	for (i = 0; i < M; i++)
// 		cin>>A[i]>>B[i]>>T[i];

// 	int answer = travelTime(N, M, L, A, B, T);
// 	printf("%d\n", answer);
// 	return 0;
// }

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:63:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |     for(int i = 0;i < nums.size();i++){
      |                   ~~^~~~~~~~~~~~~
dreaming.cpp:65:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |         if(i == nums.size() - 1){
      |            ~~^~~~~~~~~~~~~~~~~~

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 43 ms 19792 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 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 43 ms 19792 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 20 ms 7248 KB Output is correct
2 Correct 16 ms 7272 KB Output is correct
3 Correct 16 ms 7260 KB Output is correct
4 Correct 21 ms 7260 KB Output is correct
5 Correct 17 ms 7260 KB Output is correct
6 Correct 17 ms 7904 KB Output is correct
7 Correct 16 ms 7392 KB Output is correct
8 Correct 15 ms 7136 KB Output is correct
9 Correct 15 ms 7172 KB Output is correct
10 Correct 16 ms 7640 KB Output is correct
11 Correct 1 ms 2396 KB Output is correct
12 Correct 5 ms 5396 KB Output is correct
13 Correct 5 ms 5588 KB Output is correct
14 Correct 4 ms 5592 KB Output is correct
15 Correct 5 ms 5588 KB Output is correct
16 Correct 4 ms 5592 KB Output is correct
17 Correct 4 ms 5592 KB Output is correct
18 Correct 5 ms 5592 KB Output is correct
19 Correct 6 ms 5592 KB Output is correct
20 Incorrect 0 ms 348 KB Output isn't correct
21 Halted 0 ms 0 KB -

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 2396 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 43 ms 19792 KB Output isn't correct
2 Halted 0 ms 0 KB -