oj.uz

Submission #1062411

# Submission time Handle Problem Language Result Execution time Memory
1062411 2024-08-17T06:22:53 Z tamir1 Islands (IOI08_islands) C++17
36 / 100
 2000 ms 131072 KB 
#include<bits/stdc++.h>
#define ll long long
#define ff first
#define ss second
using namespace std;
int n,x,p;
vector<pair<int,ll>> v[1000005];
vector<int> com[1000005];
ll ans,l,dis[1000005];
bitset<1000005> ok;
priority_queue<pair<ll,int>> q;
void dfs(int x){
	if(ok[x]) return;
	ok[x]=1;
	com[p].push_back(x);
	for(pair<int,ll> i:v[x]){
		dfs(i.ff);
	}
}
void dijk(){
	while(!q.empty()){
		ll d=q.top().ff;
		int x=q.top().ss;
		q.pop();
		if(ok[x]) continue;
		ok[x]=1;
		dis[x]=d;
		for(pair<int,ll> i:v[x]){
			if(!ok[i.ff]) q.push({d+i.ss,i.ff});
		}
	}
}
ll solve(int p){
	ll mx=0,m;
	for(int i:com[p]){
		q.push({0,i});
		dijk();
		m=0;
		for(int j:com[p]){
			m=max(m,dis[j]);
			dis[j]=0;
			ok[j]=0;
		}
		mx=max(mx,m);
	}
	return mx;
}
int main(){
	ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n;
	for(int i=1;i<=n;i++){
		cin >> x >> l;
		v[i].push_back({x,l});
		v[x].push_back({i,l});
	}
	for(int i=1;i<=n;i++){
		if(!ok[i]){
			p++;
			dfs(i);
		}
	}
	ok.reset();
	for(int i=1;i<=p;i++) ans+=solve(i);
	cout << ans;
}

Subtask #1
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 48988 KB Output is correct
2 Correct 9 ms 49108 KB Output is correct
3 Correct 12 ms 48988 KB Output is correct
4 Correct 8 ms 49104 KB Output is correct
5 Correct 8 ms 48984 KB Output is correct
6 Correct 11 ms 49076 KB Output is correct
7 Correct 8 ms 48984 KB Output is correct
8 Correct 7 ms 48968 KB Output is correct
9 Correct 8 ms 49164 KB Output is correct
10 Correct 8 ms 48988 KB Output is correct
11 Correct 9 ms 48988 KB Output is correct

Subtask #2
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 49096 KB Output is correct
2 Correct 8 ms 49496 KB Output is correct

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Incorrect 8 ms 49244 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2032 ms 52268 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 2027 ms 55256 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 2009 ms 63684 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2040 ms 74064 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 247 ms 131072 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Runtime error 229 ms 131072 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -