oj.uz

Submission #716458

# Submission time Handle Problem Language Result Execution time Memory
716458 2023-03-30T06:29:39 Z faribourz Dynamic Diameter (CEOI19_diameter) C++17
24 / 100
 906 ms 35876 KB 
// Only GOD
// Believe in yourself!
// -o Sango zadam be shishe 
// -o Comeback bezan hamishe!

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> pii;

#define pb push_back
#define F first
#define S second
#define bit(x, y) (x >> y)&1
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define kill(x) return cout << x << '\n', void()
#define KILL(x) return cout << x << '\n', 0
#define int ll
#define mid ((l+r)>>1)
#define lid (id << 1)
#define rid (lid | 1)
const int N = 3e5+10;
const int INF = 1e9+10;
int n, q, W;
vector<pii> G[N];
int edge[N], dp[N], maxout[N], lst, h[N];
pii EDGE[N];
map<pii, int> E;
// chinese seg:)
void upd(int id){
	int mx1 = maxout[lid] + E[{id, lid}], mx2 = maxout[rid] + E[{id, rid}];
	maxout[id] = max(mx1, mx2);
	dp[id] = mx1 + mx2;
	lst = max({lst, dp[id], dp[rid], dp[lid]});
	id >>= 1;
	for(; id > 0; id >>= 1){
		int mx1 = maxout[lid] + E[{id, lid}], mx2 = maxout[rid] + E[{id, rid}];
		maxout[id] = max(mx1, mx2);
		dp[id] = mx1 + mx2;
		lst = max({lst, dp[id], dp[rid], dp[lid]});
	}
}
void DFS(int v, int p = -1){
	int mx1 = -1, mx2 = -1;
	for(auto x : G[v]){
		if(x.F == p)
			continue;
		h[x.F] = h[v] + 1;
		DFS(x.F, v);
		if(edge[x.S] + maxout[x.F] >= mx1){
			swap(mx1, mx2);
			mx1 = edge[x.S] + maxout[x.F]; 
		}
		else if(edge[x.S] + maxout[x.F] > mx2){
			mx2 = edge[x.S] + maxout[x.F]; 
		}
	}
	maxout[v] = (mx1==-1 ? 0 : mx1);
	if(mx2 != -1){
		dp[v] = mx1 + mx2;
	}
}
int32_t main(){
	ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	cin >> n >> q >> W;
	bool f = 0;
	for(int i = 0; i < n-1; i++){
		int v, u, w;
		cin >> v >> u >> w;
		G[v].pb({u, i});
		G[u].pb({v, i});
		if(v != 1 && u != 1)
			f = 1;
		edge[i] = w;
		EDGE[i]={v, u};
		E[{v, u}]=w;
		E[{u, v}]=w;
	}	
	lst = 0;
	if(n <= 5001 && q <= 5001){
		while(q--){
			int d, e;
			cin >> d >> e;
			edge[(d+lst)%(n-1)] = (e+lst)%W;
			DFS(1);
			lst = 0;
			for(int i = 1; i <= n; i++)
				lst = max({lst, dp[i], maxout[i]});
			cout << lst << '\n';
		}
	}
	else if(!f){
		set<pii> s;
		for(int i = 0; i < n-1; i++){
			s.insert({edge[i], i});
		}
		while(q--){
			int d, e;
			cin >> d >> e;
			int XX = (d+lst)%(n-1), YY = (e+lst)%W;
			s.erase({edge[XX], XX});
			edge[XX] = YY;
			s.insert({edge[XX], XX});
			if(n==2){
				lst = (*s.rbegin()).F;
			}
			else{
				auto itr = s.rbegin();
				lst = (*itr).F;
				itr--;
				lst += (*itr).F;
			}
			cout << lst << '\n';
		}
	}
	else{
		DFS(1);
		while(q--){
			int d, e;
			cin >> d >> e;
			edge[(d+lst)%(n-1)] = (e+lst)%W;
			int v = EDGE[(d+lst)%(n-1)].F, u = EDGE[(d+lst)%(n-1)].S;
			E[{v, u}] = (e+lst)%W;
			E[{u, v}] = E[{v, u}];
			if(u < v)
				swap(v, u);
			lst = 0;
			upd(v);
			cout << lst << '\n';
		}
	}
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 4 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 4 ms 7396 KB Output is correct
6 Correct 4 ms 7380 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7412 KB Output is correct
9 Correct 4 ms 7380 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 4 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7380 KB Output is correct
16 Correct 4 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 4 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 4 ms 7396 KB Output is correct
6 Correct 4 ms 7380 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7412 KB Output is correct
9 Correct 4 ms 7380 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 4 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7380 KB Output is correct
16 Correct 4 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct
19 Correct 91 ms 7620 KB Output is correct
20 Correct 90 ms 7508 KB Output is correct
21 Correct 95 ms 7620 KB Output is correct
22 Correct 112 ms 7752 KB Output is correct
23 Correct 697 ms 8432 KB Output is correct
24 Correct 803 ms 8532 KB Output is correct
25 Correct 812 ms 8476 KB Output is correct
26 Correct 843 ms 9064 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 4 ms 7380 KB Output is correct
4 Incorrect 11 ms 7452 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 18 ms 7508 KB Output is correct
2 Incorrect 14 ms 7636 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Incorrect 906 ms 35876 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7380 KB Output is correct
2 Correct 4 ms 7380 KB Output is correct
3 Correct 4 ms 7380 KB Output is correct
4 Correct 4 ms 7380 KB Output is correct
5 Correct 4 ms 7396 KB Output is correct
6 Correct 4 ms 7380 KB Output is correct
7 Correct 4 ms 7380 KB Output is correct
8 Correct 4 ms 7412 KB Output is correct
9 Correct 4 ms 7380 KB Output is correct
10 Correct 4 ms 7380 KB Output is correct
11 Correct 4 ms 7380 KB Output is correct
12 Correct 4 ms 7380 KB Output is correct
13 Correct 4 ms 7380 KB Output is correct
14 Correct 4 ms 7380 KB Output is correct
15 Correct 4 ms 7380 KB Output is correct
16 Correct 4 ms 7380 KB Output is correct
17 Correct 4 ms 7380 KB Output is correct
18 Correct 4 ms 7380 KB Output is correct
19 Correct 91 ms 7620 KB Output is correct
20 Correct 90 ms 7508 KB Output is correct
21 Correct 95 ms 7620 KB Output is correct
22 Correct 112 ms 7752 KB Output is correct
23 Correct 697 ms 8432 KB Output is correct
24 Correct 803 ms 8532 KB Output is correct
25 Correct 812 ms 8476 KB Output is correct
26 Correct 843 ms 9064 KB Output is correct
27 Correct 4 ms 7380 KB Output is correct
28 Correct 4 ms 7380 KB Output is correct
29 Correct 4 ms 7380 KB Output is correct
30 Incorrect 11 ms 7452 KB Output isn't correct
31 Halted 0 ms 0 KB -