oj.uz

Submission #510194

# Submission time Handle Problem Language Result Execution time Memory
510194 2022-01-14T18:54:11 Z Yazan_Alattar Islands (IOI08_islands) C++14
40 / 100
 2000 ms 31008 KB 
#include <iostream>
#include <fstream>
#include <vector>
#include <cstring>
#include <algorithm>
#include <set>
#include <map>
#include <queue>
#include <list>
#include <utility>
#include <cmath>
#include <numeric>
#include <assert.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
#define pb push_back
#define endl "\n"
#define all(x) x.begin(), x.end()
const int M = 200007;
const ll inf = 1e18;
const ll mod = 1e9 + 7;
const double pi = acos(-1);
const int dx[] = {1, 0, -1, 0}, dy[] = {0, 1, 0, -1};

vector < pair < int,ll > > adj[M];
ll n, ans, grp[M], mx[M], curgroup;
bool vist[M], on[M];

void connect(int node)
{
    grp[node] = curgroup;
    vist[node] = 1;
    for(auto i : adj[node]){
        if(vist[i.F]) continue;
        connect(i.F);
    }
    return;
}

ll dfs(int node, ll cost)
{
    ll ret = cost;
    on[node] = 1;
    for(auto i : adj[node]){
        if(on[i.F]) continue;
        ret = max(ret, dfs(i.F, cost + i.S));
    }
    on[node] = 0;
    return ret;
}

int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n;
    for(int i = 1; i <= n; ++i){
        ll x, y;
        cin >> x >> y;
        adj[x].pb({i, y});
        adj[i].pb({x, y});
    }
    for(int i = 1; i <= n; ++i){
        curgroup = i;
        if(!grp[i]) connect(i);
        mx[grp[i]] = max(mx[grp[i]], dfs(i, 0));
    }
    for(int i = 1; i <= n; ++i) ans += mx[i];
    cout << ans << endl;
    return 0;
}

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5032 KB Output is correct
2 Correct 3 ms 4940 KB Output is correct
3 Correct 8 ms 5068 KB Output is correct
4 Correct 3 ms 4996 KB Output is correct
5 Correct 4 ms 4940 KB Output is correct
6 Correct 3 ms 5016 KB Output is correct
7 Correct 2 ms 4940 KB Output is correct
8 Correct 4 ms 4940 KB Output is correct
9 Correct 3 ms 4940 KB Output is correct
10 Correct 3 ms 4940 KB Output is correct
11 Correct 3 ms 5068 KB Output is correct

Subtask #2
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 5020 KB Output is correct
2 Correct 3 ms 5152 KB Output is correct

Subtask #3
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 5196 KB Output is correct
2 Correct 654 ms 5452 KB Output is correct

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2048 ms 6308 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2059 ms 9936 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2043 ms 19136 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 70 ms 31008 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 7 ms 9928 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 16 ms 12432 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -