oj.uz

Submission #334606

# Submission time Handle Problem Language Result Execution time Memory
334606 2020-12-09T14:58:05 Z achibasadzishvili Sjekira (COCI20_sjekira) C++14
110 / 110
 84 ms 14956 KB 
#include<bits/stdc++.h>
#define ll long long
#define f first
#define s second
#define pb push_back
using namespace std;
ll n,p[200005],mx[200005],ans;
pair<ll,ll>a[200005];
vector<ll>v[200005];
ll find(ll x){
    if(x == p[x])return x;
    return p[x] = find(p[x]);
}
void join(ll x,ll y){
    x = find(x);
    y = find(y);
    if(x == y)return;
    ans += mx[x] + mx[y];
    mx[x] = max(mx[x] , mx[y]);
    p[y] = x;
}
int main(){
    ios::sync_with_stdio(false);
    cin >> n;
    for(int i=1; i<=n; i++){
        p[i] = i;
        cin >> a[i].f;
        mx[i] = a[i].f;
        a[i].s = i;
    }
    for(int i=1; i<n; i++){
        ll x,y;
        cin >> x >> y;
        if(a[x].f >= a[y].f)
            v[x].pb(y);
        if(a[y].f >= a[x].f)
            v[y].pb(x);
    }
    sort(a + 1 , a + n + 1);
    for(int o=1; o<=n; o++){
        ll x = a[o].s;
        for(int i=0; i<v[x].size(); i++){
            ll y = v[x][i];
            join(x , y);
        }
    }
    
    cout << ans << '\n';
    
    return 0;
}

Compilation message

sjekira.cpp: In function 'int main()':
sjekira.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for(int i=0; i<v[x].size(); i++){
      |                      ~^~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 5 ms 5100 KB Output is correct
3 Correct 5 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 5 ms 5100 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 56 ms 10988 KB Output is correct
2 Correct 41 ms 9580 KB Output is correct
3 Correct 40 ms 9452 KB Output is correct
4 Correct 44 ms 9964 KB Output is correct
5 Correct 66 ms 12396 KB Output is correct
6 Correct 57 ms 14956 KB Output is correct
7 Correct 40 ms 13164 KB Output is correct
8 Correct 37 ms 12652 KB Output is correct
9 Correct 25 ms 10220 KB Output is correct
10 Correct 46 ms 14572 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 5 ms 5100 KB Output is correct
3 Correct 5 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 5 ms 5100 KB Output is correct
6 Correct 4 ms 5100 KB Output is correct
7 Correct 5 ms 5100 KB Output is correct
8 Correct 4 ms 5100 KB Output is correct
9 Correct 4 ms 5100 KB Output is correct
10 Correct 5 ms 5104 KB Output is correct

Subtask #4
60.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5100 KB Output is correct
2 Correct 5 ms 5100 KB Output is correct
3 Correct 5 ms 5100 KB Output is correct
4 Correct 4 ms 5100 KB Output is correct
5 Correct 5 ms 5100 KB Output is correct
6 Correct 56 ms 10988 KB Output is correct
7 Correct 41 ms 9580 KB Output is correct
8 Correct 40 ms 9452 KB Output is correct
9 Correct 44 ms 9964 KB Output is correct
10 Correct 66 ms 12396 KB Output is correct
11 Correct 57 ms 14956 KB Output is correct
12 Correct 40 ms 13164 KB Output is correct
13 Correct 37 ms 12652 KB Output is correct
14 Correct 25 ms 10220 KB Output is correct
15 Correct 46 ms 14572 KB Output is correct
16 Correct 4 ms 5100 KB Output is correct
17 Correct 5 ms 5100 KB Output is correct
18 Correct 4 ms 5100 KB Output is correct
19 Correct 4 ms 5100 KB Output is correct
20 Correct 5 ms 5104 KB Output is correct
21 Correct 17 ms 6764 KB Output is correct
22 Correct 16 ms 6508 KB Output is correct
23 Correct 74 ms 11984 KB Output is correct
24 Correct 46 ms 10092 KB Output is correct
25 Correct 48 ms 9964 KB Output is correct
26 Correct 38 ms 8428 KB Output is correct
27 Correct 38 ms 8940 KB Output is correct
28 Correct 59 ms 9984 KB Output is correct
29 Correct 68 ms 8576 KB Output is correct
30 Correct 84 ms 12524 KB Output is correct