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Submission #884773

# Submission time Handle Problem Language Result Execution time Memory
884773 2023-12-08T11:57:50 Z arashMLG Dynamic Diameter (CEOI19_diameter) C++17
100 / 100
 253 ms 84188 KB 
#include<bits/stdc++.h>
#ifdef LOCAL
#include "Essentials/algo/debug.h"
#else
#define debug(...) 69
#endif
using namespace std;

typedef long long     ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;


const int N = 3e5+ 23;
const ll inf = 1e18;

#define F           first
#define S           second
#define pb          push_back
#define kill(x)     cout<<x<<endl, exit(0);
#define all(x)      x.begin(),x.end()
#define sz(x)       (int)x.size()
#define lc          (v << 1)
#define rc          ((v<<1) |1)
#define int         ll

struct node {
	int diam;
	int leftMax;
	int rightMax;
	int mxh,mnh;
	int lz;
	
	void set(int h) {
		diam = 0;
		leftMax = -h;
		rightMax = -h;
		mxh = h,mnh = h;
		lz = 0;
	}
	
	
	void merge(node a,node b) {
		mxh = max(a.mxh,b.mxh);
		mnh = min(a.mnh,b.mnh);
		
		leftMax = max({a.leftMax, b.leftMax ,b.mxh - 2*a.mnh});
		rightMax =max({a.rightMax,b.rightMax,a.mxh - 2*b.mnh});
		
		diam = max({ a.diam, b.diam, a.rightMax + b.mxh , b.leftMax+ a.mxh});
	}
} t[N<<2];

int n,q;
int h[N];
int st[N],ft[N];
int what[N];

void build(int v=1,int tl =0,int tr= N) {
	if(tr-tl == 1) {
		t[v].set(h[what[tl]]);
		return;
	}
	int mid=(tl+tr)/2;
	build(lc,tl,mid);
	build(rc,mid,tr);
	t[v].merge(t[lc],t[rc]);
	//debug(tl,tr,t[v].diam,t[v].leftMax,t[v].rightMax);
}

void shift(int v) {
	int x = t[v].lz;
	t[lc].leftMax -= x;
	t[lc].rightMax -= x;
	t[lc].mxh += x;
	t[lc].mnh += x;
	t[lc].lz += x;
	t[rc].leftMax -= x;
	t[rc].rightMax -= x;
	t[rc].mxh += x;
	t[rc].mnh += x;
	t[rc].lz += x;
	t[v].lz = 0;
}

void upd(int l,int r,int x,int v=1,int tl=0,int tr =N) {
	if(l > r) return;
	if(l == tl && r == tr-1) {
		t[v].leftMax -= x;
		t[v].rightMax -= x;
		t[v].mxh += x;
		t[v].mnh += x;
		t[v].lz += x;
		return;
	}
	shift(v);
	int mid=(tl + tr)/2;
	upd(l,min(mid-1,r),x,lc,tl,mid);
	upd(max(l,mid),r,x,rc,mid,tr);
	t[v].merge(t[lc],t[rc]);
}

int W;
int w[N];
int ver[N];
vector<pll> G[N];
int timer;

void dfs(int v,int p =-1) {
	what[timer] = v;
	st[v] = timer ++;
	for(auto [u,id] : G[v]) if(u != p) {
		ver[id] = u;
		h[u] = h[v] + w[id];
		dfs(u,v);
		what[timer] = v;
		ft[v]= timer ++;
	}
	
	what[timer] = v;
	ft[v]= timer ++;
}

int32_t main() {
    cin.tie(nullptr)->sync_with_stdio(false);
	cin>>n>>q>>W;
	int last= 0;
	for(int i = 0; i<n-1 ; i ++) {
		int v,u; cin>>v>>u>>w[i];
		G[v].pb({u,i});
		G[u].pb({v,i});
	}
	dfs(1);
	build();
	debug(t[1].diam);
	while(q--) {
		int e,d; cin>>e>>d;
		e= (e + last) % (n-1);
		d= (d +last) % W;
		int v= ver[e];
		//debug(st[v],ft[v]);
		upd(st[v],ft[v],-w[e]);
		w[e] = d;
		upd(st[v],ft[v],w[e]);
		last = t[1].diam;
		cout<<last << '\n';
	}
	
	return 0;
}

Compilation message

diameter.cpp: In function 'int32_t main()':
diameter.cpp:5:20: warning: statement has no effect [-Wunused-value]
    5 | #define debug(...) 69
      |                    ^~
diameter.cpp:135:2: note: in expansion of macro 'debug'
  135 |  debug(t[1].diam);
      |  ^~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 68184 KB Output is correct
2 Correct 11 ms 68184 KB Output is correct
3 Correct 12 ms 68188 KB Output is correct
4 Correct 12 ms 68188 KB Output is correct
5 Correct 12 ms 68336 KB Output is correct
6 Correct 11 ms 68184 KB Output is correct
7 Correct 11 ms 68332 KB Output is correct
8 Correct 11 ms 68188 KB Output is correct
9 Correct 12 ms 68188 KB Output is correct
10 Correct 11 ms 68188 KB Output is correct
11 Correct 12 ms 68188 KB Output is correct
12 Correct 12 ms 68188 KB Output is correct
13 Correct 12 ms 68188 KB Output is correct
14 Correct 12 ms 68188 KB Output is correct
15 Correct 11 ms 68188 KB Output is correct
16 Correct 11 ms 68188 KB Output is correct
17 Correct 12 ms 68188 KB Output is correct
18 Correct 11 ms 68304 KB Output is correct

Subtask #2
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 68184 KB Output is correct
2 Correct 11 ms 68184 KB Output is correct
3 Correct 12 ms 68188 KB Output is correct
4 Correct 12 ms 68188 KB Output is correct
5 Correct 12 ms 68336 KB Output is correct
6 Correct 11 ms 68184 KB Output is correct
7 Correct 11 ms 68332 KB Output is correct
8 Correct 11 ms 68188 KB Output is correct
9 Correct 12 ms 68188 KB Output is correct
10 Correct 11 ms 68188 KB Output is correct
11 Correct 12 ms 68188 KB Output is correct
12 Correct 12 ms 68188 KB Output is correct
13 Correct 12 ms 68188 KB Output is correct
14 Correct 12 ms 68188 KB Output is correct
15 Correct 11 ms 68188 KB Output is correct
16 Correct 11 ms 68188 KB Output is correct
17 Correct 12 ms 68188 KB Output is correct
18 Correct 11 ms 68304 KB Output is correct
19 Correct 16 ms 68444 KB Output is correct
20 Correct 17 ms 68444 KB Output is correct
21 Correct 18 ms 68444 KB Output is correct
22 Correct 17 ms 68480 KB Output is correct
23 Correct 18 ms 68444 KB Output is correct
24 Correct 18 ms 68700 KB Output is correct
25 Correct 19 ms 68700 KB Output is correct
26 Correct 19 ms 68952 KB Output is correct

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 68188 KB Output is correct
2 Correct 12 ms 68188 KB Output is correct
3 Correct 13 ms 68368 KB Output is correct
4 Correct 26 ms 68432 KB Output is correct
5 Correct 79 ms 68564 KB Output is correct
6 Correct 12 ms 68184 KB Output is correct
7 Correct 12 ms 68392 KB Output is correct
8 Correct 12 ms 68188 KB Output is correct
9 Correct 13 ms 68188 KB Output is correct
10 Correct 26 ms 68444 KB Output is correct
11 Correct 83 ms 68836 KB Output is correct
12 Correct 13 ms 68444 KB Output is correct
13 Correct 13 ms 68440 KB Output is correct
14 Correct 16 ms 68444 KB Output is correct
15 Correct 29 ms 68700 KB Output is correct
16 Correct 90 ms 68952 KB Output is correct
17 Correct 33 ms 75716 KB Output is correct
18 Correct 41 ms 75748 KB Output is correct
19 Correct 35 ms 75724 KB Output is correct
20 Correct 53 ms 75964 KB Output is correct
21 Correct 150 ms 76632 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 12 ms 68440 KB Output is correct
2 Correct 20 ms 68440 KB Output is correct
3 Correct 55 ms 68680 KB Output is correct
4 Correct 102 ms 68748 KB Output is correct
5 Correct 15 ms 68956 KB Output is correct
6 Correct 32 ms 69516 KB Output is correct
7 Correct 63 ms 69152 KB Output is correct
8 Correct 114 ms 69460 KB Output is correct
9 Correct 26 ms 73564 KB Output is correct
10 Correct 36 ms 73552 KB Output is correct
11 Correct 91 ms 74052 KB Output is correct
12 Correct 135 ms 74064 KB Output is correct
13 Correct 41 ms 76628 KB Output is correct
14 Correct 51 ms 76628 KB Output is correct
15 Correct 99 ms 76880 KB Output is correct
16 Correct 162 ms 77064 KB Output is correct
17 Correct 139 ms 77224 KB Output is correct

Subtask #5
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 77908 KB Output is correct
2 Correct 194 ms 77748 KB Output is correct
3 Correct 181 ms 77908 KB Output is correct
4 Correct 180 ms 77904 KB Output is correct
5 Correct 192 ms 77640 KB Output is correct
6 Correct 162 ms 77412 KB Output is correct
7 Correct 205 ms 80364 KB Output is correct
8 Correct 205 ms 80384 KB Output is correct
9 Correct 205 ms 80208 KB Output is correct
10 Correct 211 ms 80688 KB Output is correct
11 Correct 198 ms 80080 KB Output is correct
12 Correct 207 ms 79036 KB Output is correct
13 Correct 248 ms 84188 KB Output is correct
14 Correct 238 ms 84152 KB Output is correct
15 Correct 245 ms 84128 KB Output is correct
16 Correct 242 ms 84048 KB Output is correct
17 Correct 235 ms 83404 KB Output is correct
18 Correct 218 ms 80920 KB Output is correct
19 Correct 242 ms 84056 KB Output is correct
20 Correct 245 ms 84020 KB Output is correct
21 Correct 242 ms 84048 KB Output is correct
22 Correct 241 ms 83944 KB Output is correct
23 Correct 253 ms 83616 KB Output is correct
24 Correct 219 ms 80860 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 68184 KB Output is correct
2 Correct 11 ms 68184 KB Output is correct
3 Correct 12 ms 68188 KB Output is correct
4 Correct 12 ms 68188 KB Output is correct
5 Correct 12 ms 68336 KB Output is correct
6 Correct 11 ms 68184 KB Output is correct
7 Correct 11 ms 68332 KB Output is correct
8 Correct 11 ms 68188 KB Output is correct
9 Correct 12 ms 68188 KB Output is correct
10 Correct 11 ms 68188 KB Output is correct
11 Correct 12 ms 68188 KB Output is correct
12 Correct 12 ms 68188 KB Output is correct
13 Correct 12 ms 68188 KB Output is correct
14 Correct 12 ms 68188 KB Output is correct
15 Correct 11 ms 68188 KB Output is correct
16 Correct 11 ms 68188 KB Output is correct
17 Correct 12 ms 68188 KB Output is correct
18 Correct 11 ms 68304 KB Output is correct
19 Correct 16 ms 68444 KB Output is correct
20 Correct 17 ms 68444 KB Output is correct
21 Correct 18 ms 68444 KB Output is correct
22 Correct 17 ms 68480 KB Output is correct
23 Correct 18 ms 68444 KB Output is correct
24 Correct 18 ms 68700 KB Output is correct
25 Correct 19 ms 68700 KB Output is correct
26 Correct 19 ms 68952 KB Output is correct
27 Correct 12 ms 68188 KB Output is correct
28 Correct 12 ms 68188 KB Output is correct
29 Correct 13 ms 68368 KB Output is correct
30 Correct 26 ms 68432 KB Output is correct
31 Correct 79 ms 68564 KB Output is correct
32 Correct 12 ms 68184 KB Output is correct
33 Correct 12 ms 68392 KB Output is correct
34 Correct 12 ms 68188 KB Output is correct
35 Correct 13 ms 68188 KB Output is correct
36 Correct 26 ms 68444 KB Output is correct
37 Correct 83 ms 68836 KB Output is correct
38 Correct 13 ms 68444 KB Output is correct
39 Correct 13 ms 68440 KB Output is correct
40 Correct 16 ms 68444 KB Output is correct
41 Correct 29 ms 68700 KB Output is correct
42 Correct 90 ms 68952 KB Output is correct
43 Correct 33 ms 75716 KB Output is correct
44 Correct 41 ms 75748 KB Output is correct
45 Correct 35 ms 75724 KB Output is correct
46 Correct 53 ms 75964 KB Output is correct
47 Correct 150 ms 76632 KB Output is correct
48 Correct 12 ms 68440 KB Output is correct
49 Correct 20 ms 68440 KB Output is correct
50 Correct 55 ms 68680 KB Output is correct
51 Correct 102 ms 68748 KB Output is correct
52 Correct 15 ms 68956 KB Output is correct
53 Correct 32 ms 69516 KB Output is correct
54 Correct 63 ms 69152 KB Output is correct
55 Correct 114 ms 69460 KB Output is correct
56 Correct 26 ms 73564 KB Output is correct
57 Correct 36 ms 73552 KB Output is correct
58 Correct 91 ms 74052 KB Output is correct
59 Correct 135 ms 74064 KB Output is correct
60 Correct 41 ms 76628 KB Output is correct
61 Correct 51 ms 76628 KB Output is correct
62 Correct 99 ms 76880 KB Output is correct
63 Correct 162 ms 77064 KB Output is correct
64 Correct 139 ms 77224 KB Output is correct
65 Correct 185 ms 77908 KB Output is correct
66 Correct 194 ms 77748 KB Output is correct
67 Correct 181 ms 77908 KB Output is correct
68 Correct 180 ms 77904 KB Output is correct
69 Correct 192 ms 77640 KB Output is correct
70 Correct 162 ms 77412 KB Output is correct
71 Correct 205 ms 80364 KB Output is correct
72 Correct 205 ms 80384 KB Output is correct
73 Correct 205 ms 80208 KB Output is correct
74 Correct 211 ms 80688 KB Output is correct
75 Correct 198 ms 80080 KB Output is correct
76 Correct 207 ms 79036 KB Output is correct
77 Correct 248 ms 84188 KB Output is correct
78 Correct 238 ms 84152 KB Output is correct
79 Correct 245 ms 84128 KB Output is correct
80 Correct 242 ms 84048 KB Output is correct
81 Correct 235 ms 83404 KB Output is correct
82 Correct 218 ms 80920 KB Output is correct
83 Correct 242 ms 84056 KB Output is correct
84 Correct 245 ms 84020 KB Output is correct
85 Correct 242 ms 84048 KB Output is correct
86 Correct 241 ms 83944 KB Output is correct
87 Correct 253 ms 83616 KB Output is correct
88 Correct 219 ms 80860 KB Output is correct
89 Correct 179 ms 77648 KB Output is correct
90 Correct 189 ms 78012 KB Output is correct
91 Correct 196 ms 79444 KB Output is correct
92 Correct 198 ms 79188 KB Output is correct
93 Correct 217 ms 81748 KB Output is correct
94 Correct 215 ms 80724 KB Output is correct
95 Correct 236 ms 82004 KB Output is correct
96 Correct 233 ms 81236 KB Output is correct
97 Correct 238 ms 82004 KB Output is correct
98 Correct 242 ms 84008 KB Output is correct
99 Correct 236 ms 81776 KB Output is correct
100 Correct 252 ms 81840 KB Output is correct