oj.uz

Submission #1096102

# Submission time Handle Problem Language Result Execution time Memory
1096102 2024-10-03T18:34:57 Z 0pt1mus23 Parkovi (COCI22_parkovi) C++14
110 / 110
 583 ms 53960 KB 
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define int long long int
#define ins insert
#define pb push_back
#define putr(x) cout<<x<<endl;return;
#define all(x) x.begin(),x.end()
#define _ << " " <<  
const int   mod = 1e9+7 ,
            sze= 2e5 + 23 ,
            inf = 2e14,
            L = 31 ;
vector<pair<int,int>> graph[sze];
vector<int> alst;
int dp[sze][2];
void dfs(int node,int par,int mid){
    for(auto [a,b]:graph[node]){
        if(a!=par){
            dfs(a,node,mid);
            dp[node][0] = min(dp[node][0],dp[a][0] + b);
            if(dp[a][1] + b <= mid){
                dp[node][1]=max(dp[node][1],dp[a][1] + b);
            }
            else{
                // cout<<mid<<" => "<<a<<endl;
                alst.pb(a);
                dp[node][0]=min(dp[node][0],b);
            }

        }
    }
    if(dp[node][0] + dp[node][1] <= mid){
        dp[node][1]=-inf;
    }
    // cout<<mid<<"=> " _  node _ dp[node][0] _ dp[node][1]<<endl;
}
int check(int mid){
    alst.clear();
    for(int i=0;i<sze;i++){
        dp[i][0]=inf;
        dp[i][1]=0;
    }

    dfs(1,0,mid);


    if(dp[1][0] + dp[1][1] > mid){
        alst.pb(1);
    }

    return alst.size();
}

void opt1z(){
    int n,k;
    cin>>n>>k;
    for(int i =1;i<n;i++){
        int u,v,w;
        cin>>u>>v>>w;
        graph[u].pb({v,w});
        graph[v].pb({u,w});
    }
    int l =1;
    int r = (int)2e9 * (int)2e5;
    int ans=1;
    while(l<=r){
        int mid = (l+r)/2;
        if(check(mid)<=k){
            ans = mid;
            r = mid -1;
        }
        else{
            l = mid+1;
        }
    }
    check(ans);
    set<int> a;
    for(auto v:alst){
        a.ins(v);
    }
    for(int i=1;i<=n;i++){
        if(a.size()<k && a.find(i)==a.end()){
            a.ins(i);
            // cout<< "new " _ i<<endl;
        }
    }
    cout<<ans<<"\n";
    for(auto v:a) cout<<v<<" ";cout<<endl;
}
 
signed main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int tt = 1;
    // cin>>tt;
    while(tt--){
        opt1z();
    }
 
    return 0;
}

Compilation message

Main.cpp: In function 'void dfs(long long int, long long int, long long int)':
Main.cpp:18:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   18 |     for(auto [a,b]:graph[node]){
      |              ^
Main.cpp: In function 'void opt1z()':
Main.cpp:83:20: warning: comparison of integer expressions of different signedness: 'std::set<long long int>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
   83 |         if(a.size()<k && a.find(i)==a.end()){
      |            ~~~~~~~~^~
Main.cpp:89:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   89 |     for(auto v:a) cout<<v<<" ";cout<<endl;
      |     ^~~
Main.cpp:89:32: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   89 |     for(auto v:a) cout<<v<<" ";cout<<endl;
      |                                ^~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 8536 KB Output is correct
2 Correct 9 ms 8284 KB Output is correct
3 Correct 10 ms 8284 KB Output is correct
4 Correct 10 ms 8284 KB Output is correct
5 Correct 9 ms 8284 KB Output is correct
6 Correct 10 ms 8288 KB Output is correct
7 Correct 9 ms 8284 KB Output is correct
8 Correct 11 ms 8284 KB Output is correct
9 Correct 10 ms 8284 KB Output is correct
10 Correct 10 ms 8284 KB Output is correct
11 Correct 12 ms 8288 KB Output is correct
12 Correct 10 ms 8284 KB Output is correct
13 Correct 17 ms 8284 KB Output is correct
14 Correct 10 ms 8232 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 276 ms 37616 KB Output is correct
2 Correct 317 ms 42576 KB Output is correct
3 Correct 158 ms 22964 KB Output is correct
4 Correct 454 ms 22088 KB Output is correct
5 Correct 426 ms 21584 KB Output is correct
6 Correct 405 ms 21824 KB Output is correct
7 Correct 442 ms 20412 KB Output is correct
8 Correct 466 ms 21064 KB Output is correct
9 Correct 406 ms 21584 KB Output is correct
10 Correct 439 ms 21584 KB Output is correct
11 Correct 403 ms 23928 KB Output is correct
12 Correct 402 ms 23892 KB Output is correct
13 Correct 430 ms 25332 KB Output is correct
14 Correct 376 ms 22356 KB Output is correct
15 Correct 379 ms 21892 KB Output is correct
16 Correct 396 ms 23476 KB Output is correct
17 Correct 351 ms 22612 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 299 ms 38740 KB Output is correct
2 Correct 276 ms 42320 KB Output is correct
3 Correct 250 ms 40532 KB Output is correct
4 Correct 224 ms 40276 KB Output is correct
5 Correct 348 ms 53016 KB Output is correct
6 Correct 328 ms 47816 KB Output is correct
7 Correct 352 ms 49852 KB Output is correct
8 Correct 277 ms 42832 KB Output is correct
9 Correct 289 ms 42568 KB Output is correct
10 Correct 266 ms 41772 KB Output is correct
11 Correct 273 ms 40484 KB Output is correct
12 Correct 360 ms 53960 KB Output is correct
13 Correct 371 ms 51396 KB Output is correct
14 Correct 341 ms 47812 KB Output is correct
15 Correct 279 ms 41044 KB Output is correct
16 Correct 247 ms 39760 KB Output is correct
17 Correct 242 ms 39628 KB Output is correct
18 Correct 277 ms 41556 KB Output is correct
19 Correct 275 ms 50372 KB Output is correct
20 Correct 294 ms 48764 KB Output is correct
21 Correct 269 ms 46620 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 8536 KB Output is correct
2 Correct 9 ms 8284 KB Output is correct
3 Correct 10 ms 8284 KB Output is correct
4 Correct 10 ms 8284 KB Output is correct
5 Correct 9 ms 8284 KB Output is correct
6 Correct 10 ms 8288 KB Output is correct
7 Correct 9 ms 8284 KB Output is correct
8 Correct 11 ms 8284 KB Output is correct
9 Correct 10 ms 8284 KB Output is correct
10 Correct 10 ms 8284 KB Output is correct
11 Correct 12 ms 8288 KB Output is correct
12 Correct 10 ms 8284 KB Output is correct
13 Correct 17 ms 8284 KB Output is correct
14 Correct 10 ms 8232 KB Output is correct
15 Correct 276 ms 37616 KB Output is correct
16 Correct 317 ms 42576 KB Output is correct
17 Correct 158 ms 22964 KB Output is correct
18 Correct 454 ms 22088 KB Output is correct
19 Correct 426 ms 21584 KB Output is correct
20 Correct 405 ms 21824 KB Output is correct
21 Correct 442 ms 20412 KB Output is correct
22 Correct 466 ms 21064 KB Output is correct
23 Correct 406 ms 21584 KB Output is correct
24 Correct 439 ms 21584 KB Output is correct
25 Correct 403 ms 23928 KB Output is correct
26 Correct 402 ms 23892 KB Output is correct
27 Correct 430 ms 25332 KB Output is correct
28 Correct 376 ms 22356 KB Output is correct
29 Correct 379 ms 21892 KB Output is correct
30 Correct 396 ms 23476 KB Output is correct
31 Correct 351 ms 22612 KB Output is correct
32 Correct 299 ms 38740 KB Output is correct
33 Correct 276 ms 42320 KB Output is correct
34 Correct 250 ms 40532 KB Output is correct
35 Correct 224 ms 40276 KB Output is correct
36 Correct 348 ms 53016 KB Output is correct
37 Correct 328 ms 47816 KB Output is correct
38 Correct 352 ms 49852 KB Output is correct
39 Correct 277 ms 42832 KB Output is correct
40 Correct 289 ms 42568 KB Output is correct
41 Correct 266 ms 41772 KB Output is correct
42 Correct 273 ms 40484 KB Output is correct
43 Correct 360 ms 53960 KB Output is correct
44 Correct 371 ms 51396 KB Output is correct
45 Correct 341 ms 47812 KB Output is correct
46 Correct 279 ms 41044 KB Output is correct
47 Correct 247 ms 39760 KB Output is correct
48 Correct 242 ms 39628 KB Output is correct
49 Correct 277 ms 41556 KB Output is correct
50 Correct 275 ms 50372 KB Output is correct
51 Correct 294 ms 48764 KB Output is correct
52 Correct 269 ms 46620 KB Output is correct
53 Correct 423 ms 21940 KB Output is correct
54 Correct 438 ms 22352 KB Output is correct
55 Correct 482 ms 22868 KB Output is correct
56 Correct 472 ms 23240 KB Output is correct
57 Correct 534 ms 27340 KB Output is correct
58 Correct 418 ms 22052 KB Output is correct
59 Correct 568 ms 34504 KB Output is correct
60 Correct 453 ms 21428 KB Output is correct
61 Correct 381 ms 20048 KB Output is correct
62 Correct 450 ms 26312 KB Output is correct
63 Correct 498 ms 21328 KB Output is correct
64 Correct 501 ms 31936 KB Output is correct
65 Correct 445 ms 21856 KB Output is correct
66 Correct 497 ms 26824 KB Output is correct
67 Correct 396 ms 21068 KB Output is correct
68 Correct 583 ms 33988 KB Output is correct
69 Correct 296 ms 42404 KB Output is correct
70 Correct 238 ms 40016 KB Output is correct
71 Correct 367 ms 48436 KB Output is correct
72 Correct 139 ms 22036 KB Output is correct
73 Correct 141 ms 22196 KB Output is correct
74 Correct 185 ms 27224 KB Output is correct
75 Correct 369 ms 24400 KB Output is correct
76 Correct 400 ms 23636 KB Output is correct
77 Correct 377 ms 23756 KB Output is correct
78 Correct 396 ms 25312 KB Output is correct