oj.uz

Submission #354890

# Submission time Handle Problem Language Result Execution time Memory
354890 2021-01-22T07:06:03 Z kshitij_sodani Training (IOI07_training) C++14
30 / 100
 3 ms 768 KB 
//#pragma GCC optimize("Ofast,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
typedef long long llo;
#define mp make_pair
#define pb push_back
#define a first 
#define b second
#define endl '\n'
llo n,m;
vector<llo> adj[2001];
llo pos=0;
llo ind[2001];
vector<llo> ss;
vector<pair<llo,llo>> pre[2001];
llo dp[2001];
void dfs(llo no){
	pos++;
	ss.pb(no);
	ind[no]=pos;
	for(auto j:adj[no]){
		if(ind[j]==0){
			dfs(j);
		}
	}
}
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>n>>m;
	vector<pair<pair<llo,llo>,llo>> ed;
	for(llo i=0;i<m;i++){
		llo aa,bb,cc;
		cin>>aa>>bb>>cc;
		aa--;
		bb--;
		if(cc==0){
			adj[aa].pb(bb);
			adj[bb].pb(aa);
		}
		else{
			ed.pb({{aa,bb},cc});
		}
	}
	llo cur=0;
	for(llo i=0;i<n;i++){
		if(adj[i].size()==1){
			cur=i;
		}
	}
	dfs(cur);
	llo ans=0;
	for(auto j:ed){
		if((abs(ind[j.a.a]-ind[j.a.b])%2==1)){
			ans+=j.b;
		}
		else{
			if(ind[j.a.a]<ind[j.a.b]){
				pre[j.a.b].pb({j.a.a,j.b});
			}
			else{
				pre[j.a.a].pb({j.a.b,j.b});
			}
		}
	}

	for(llo i=0;i<n;i++){

		for(auto j:pre[ss[i]]){
			dp[i+1]=max(dp[i+1],dp[ind[j.a]]+j.b);
			ans+=j.b;
		}
		dp[i+1]=max(dp[i+1],dp[i]);
	}
	ans-=dp[n];
	cout<<ans<<endl;





	
 
	return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 620 KB Output is correct
2 Correct 2 ms 748 KB Output is correct

Subtask #4
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 492 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 620 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 748 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 768 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #11
0 / 9.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 748 KB Output isn't correct
2 Halted 0 ms 0 KB -