oj.uz

Submission #579272

# Submission time Handle Problem Language Result Execution time Memory
579272 2022-06-18T17:15:12 Z temporary_juggernaut Dynamic Diameter (CEOI19_diameter) C++14
42 / 100
 4548 ms 191940 KB 
#include<bits/stdc++.h>
#define fr first
#define sc second
using namespace std;
typedef long long ll;
typedef long double ld;
#define USING_ORDERED_SET 0
#if USING_ORDERED_SET
#include<bits/extc++.h>
using namespace __gnu_pbds;
template<class T>using ordered_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
#endif
template<class T>void umax(T &a,T b){if(a<b)a=b;}
template<class T>void umin(T &a,T b){if(b<a)a=b;}
#ifdef juggernaut
    #define printl(args...) printf(args)
#else
    #define printl(args...) 0
#endif
int n,q;
int timer[20];
int tin[100005][20];
int tout[100005][20];
ll w[100005];
multiset<ll>st[100005];
pair<int,int>edge[100005];
vector<pair<int,int>>g[100005];
bool vis[100005];
int sz[100005];
int par[100005];
int depth[100005];
int prepar[100005][20];
struct MultiSegmentTree{
	vector<ll>tree;
	vector<ll>lazy;
	MultiSegmentTree(){
	}
	MultiSegmentTree(int n){
		tree.assign(n<<2|3,0ll);
		lazy.assign(n<<2|3,0ll);
	}
	void push(int v,bool bit){
		if(bit){
			lazy[v<<1]+=lazy[v];
			lazy[v<<1|1]+=lazy[v];
		}
		tree[v]+=lazy[v];
		lazy[v]=0;
	}
	ll get(int ql,int qr,int v,int l,int r){
		if(qr<l||r<ql)return 0ll;
		push(v,l^r);
		if(ql<=l&&r<=qr)return tree[v];
		int mid=(l+r)>>1;
		return max(get(ql,qr,v<<1,l,mid),get(ql,qr,v<<1|1,mid+1,r));
	}
	void update(int ql,int qr,ll val,int v,int l,int r){
		push(v,l^r);
		if(qr<l||r<ql)return;
		if(ql<=l&&r<=qr){
			lazy[v]+=val;
			push(v,l^r);
			return;
		}
		int mid=(l+r)>>1;
		update(ql,qr,val,v<<1,l,mid);
		update(ql,qr,val,v<<1|1,mid+1,r);
		tree[v]=max(tree[v<<1],tree[v<<1|1]);
	}
};
MultiSegmentTree tree[20],alls;
void build_sz(int v,int p){
	sz[v]=1;
	for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr])){
		build_sz(to.fr,v);
		sz[v]+=sz[to.fr];
	}
}
int centroid(int v,int p,int sz){
	bool can;
	while(true){
		can=true;
		for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr])){
			if(::sz[to.fr]>sz){
				can=false;
				p=v;
				v=to.fr;
				break;
			}
		}
		if(can)return v;
	}
}
void build_tin(int v,int p,int &depth,int &kylych){
	tin[v][depth]=++timer[depth];
	prepar[v][depth]=kylych;
	for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr]))build_tin(to.fr,v,depth,kylych);
	tout[v][depth]=timer[depth];
}
ll cash;
map<int,ll>csh[100005];
void go(int v,int p,int &depth,ll kylych){
	tree[depth].update(tin[v][depth],tin[v][depth],kylych,1,1,n);
	umax(cash,kylych);
	for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr]))go(to.fr,v,depth,kylych+w[to.sc]);
}
void build(int v,int p,int dep){
	build_sz(v,0);
	v=centroid(v,0,sz[v]>>1);
	tin[v][dep]=++timer[dep];
	for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr])){
		build_tin(to.fr,v,dep,to.fr);
	}
	tout[v][dep]=timer[dep];
	for(auto &to:g[v])if((to.fr^p)&&(!vis[to.fr])){
		cash=0;
		go(to.fr,v,dep,w[to.sc]);
		st[v].insert(cash);
		csh[v][to.fr]=cash;
	}
	par[v]=p;
	depth[v]=dep;
	vis[v]=true;
	for(auto &to:g[v])if(!vis[to.fr])build(to.fr,v,dep+1);
}
ll ans;
int cand_x,cand_y;
void edit(int v,ll val){
	int x=cand_x;
	int y=cand_y;
	if(tin[x][depth[v]]<tin[y][depth[v]])swap(x,y);
	int child=prepar[x][depth[v]];
	st[v].erase(st[v].find(csh[v][child]));
	tree[depth[v]].update(tin[x][depth[v]],tout[x][depth[v]],val,1,1,n);
	csh[v][child]=tree[depth[v]].get(tin[child][depth[v]],tout[child][depth[v]],1,1,n);
	st[v].insert(csh[v][child]);
	ll ans=0;
	auto it=st[v].rbegin();
	ans+=*it;
	if((int)st[v].size()!=1){
		it++;
		ans+=*it;
	}
	alls.update(v,v,ans-alls.get(v,v,1,1,n),1,1,n);
}
int main(){
	scanf("%d%d%lld",&n,&q,&w[0]);
	for(int i=0;i<20;i++)tree[i]=MultiSegmentTree(n);
	alls=MultiSegmentTree(n);
	for(int i=1;i^n;i++){
		scanf("%d%d%lld",&edge[i].fr,&edge[i].sc,&w[i]);
		g[edge[i].fr].emplace_back(edge[i].sc,i);
		g[edge[i].sc].emplace_back(edge[i].fr,i);
	}
	build(1,0,0);
	for(int i=1;i^n;i++)if(depth[edge[i].fr]>depth[edge[i].sc])swap(edge[i].fr,edge[i].sc);
	while(q--){
		ll x;
		ll y;
		scanf("%lld%lld",&x,&y);
		x=((x+ans)%(n-1))+1;
		y=(y+ans)%w[0];
		ll pivot=y-w[x];
		w[x]=y;
		cand_x=edge[x].fr;
		cand_y=edge[x].sc;
		x=edge[x].fr;
		while(x){
			edit(x,pivot);
			x=par[x];
		}
		ans=alls.get(1,n,1,1,n);
		printl("______________________");
		printf("%lld\n",ans);
	}
}

Compilation message

diameter.cpp: In function 'int main()':
diameter.cpp:18:29: warning: statement has no effect [-Wunused-value]
   18 |     #define printl(args...) 0
      |                             ^
diameter.cpp:173:3: note: in expansion of macro 'printl'
  173 |   printl("______________________");
      |   ^~~~~~
diameter.cpp:147:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  147 |  scanf("%d%d%lld",&n,&q,&w[0]);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
diameter.cpp:151:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  151 |   scanf("%d%d%lld",&edge[i].fr,&edge[i].sc,&w[i]);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
diameter.cpp:160:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  160 |   scanf("%lld%lld",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 7 ms 12100 KB Output is correct
4 Correct 6 ms 12008 KB Output is correct
5 Correct 6 ms 12048 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 12180 KB Output is correct
8 Correct 9 ms 12116 KB Output is correct
9 Correct 8 ms 12116 KB Output is correct
10 Correct 8 ms 12116 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 8 ms 12116 KB Output is correct
13 Correct 9 ms 12244 KB Output is correct
14 Correct 7 ms 12244 KB Output is correct
15 Correct 7 ms 12188 KB Output is correct
16 Correct 7 ms 12244 KB Output is correct
17 Correct 7 ms 12244 KB Output is correct
18 Correct 7 ms 12244 KB Output is correct

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 7 ms 12100 KB Output is correct
4 Correct 6 ms 12008 KB Output is correct
5 Correct 6 ms 12048 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 12180 KB Output is correct
8 Correct 9 ms 12116 KB Output is correct
9 Correct 8 ms 12116 KB Output is correct
10 Correct 8 ms 12116 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 8 ms 12116 KB Output is correct
13 Correct 9 ms 12244 KB Output is correct
14 Correct 7 ms 12244 KB Output is correct
15 Correct 7 ms 12188 KB Output is correct
16 Correct 7 ms 12244 KB Output is correct
17 Correct 7 ms 12244 KB Output is correct
18 Correct 7 ms 12244 KB Output is correct
19 Correct 33 ms 13820 KB Output is correct
20 Correct 35 ms 13820 KB Output is correct
21 Correct 43 ms 13840 KB Output is correct
22 Correct 46 ms 13984 KB Output is correct
23 Incorrect 64 ms 20880 KB Output isn't correct
24 Halted 0 ms 0 KB -

Subtask #3
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 12116 KB Output is correct
2 Correct 8 ms 12116 KB Output is correct
3 Correct 8 ms 12116 KB Output is correct
4 Correct 21 ms 12192 KB Output is correct
5 Correct 76 ms 12460 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 8 ms 12884 KB Output is correct
8 Correct 8 ms 12884 KB Output is correct
9 Correct 11 ms 12968 KB Output is correct
10 Correct 36 ms 13004 KB Output is correct
11 Correct 128 ms 13384 KB Output is correct
12 Correct 15 ms 20820 KB Output is correct
13 Correct 15 ms 20820 KB Output is correct
14 Correct 18 ms 20832 KB Output is correct
15 Correct 55 ms 20940 KB Output is correct
16 Correct 204 ms 21352 KB Output is correct
17 Correct 208 ms 184768 KB Output is correct
18 Correct 207 ms 184752 KB Output is correct
19 Correct 292 ms 184768 KB Output is correct
20 Correct 275 ms 184868 KB Output is correct
21 Correct 687 ms 185456 KB Output is correct

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 13744 KB Output is correct
2 Correct 52 ms 13864 KB Output is correct
3 Correct 218 ms 13960 KB Output is correct
4 Correct 451 ms 14392 KB Output is correct
5 Correct 65 ms 29504 KB Output is correct
6 Incorrect 238 ms 29548 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #5
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 3206 ms 186272 KB Output is correct
2 Correct 3217 ms 186148 KB Output is correct
3 Correct 3153 ms 186276 KB Output is correct
4 Correct 3105 ms 186104 KB Output is correct
5 Correct 2948 ms 186248 KB Output is correct
6 Correct 2700 ms 186228 KB Output is correct
7 Correct 3958 ms 188392 KB Output is correct
8 Correct 3928 ms 188324 KB Output is correct
9 Correct 4221 ms 188368 KB Output is correct
10 Correct 3944 ms 188316 KB Output is correct
11 Correct 3989 ms 188316 KB Output is correct
12 Correct 3773 ms 188244 KB Output is correct
13 Correct 4355 ms 191820 KB Output is correct
14 Correct 4350 ms 191756 KB Output is correct
15 Correct 4305 ms 191784 KB Output is correct
16 Correct 4548 ms 191692 KB Output is correct
17 Correct 4273 ms 191288 KB Output is correct
18 Correct 3830 ms 189900 KB Output is correct
19 Correct 4391 ms 191940 KB Output is correct
20 Correct 4424 ms 191804 KB Output is correct
21 Correct 4294 ms 191764 KB Output is correct
22 Correct 4295 ms 191756 KB Output is correct
23 Correct 4175 ms 191428 KB Output is correct
24 Correct 3862 ms 189876 KB Output is correct

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 7 ms 12100 KB Output is correct
4 Correct 6 ms 12008 KB Output is correct
5 Correct 6 ms 12048 KB Output is correct
6 Correct 6 ms 11988 KB Output is correct
7 Correct 7 ms 12180 KB Output is correct
8 Correct 9 ms 12116 KB Output is correct
9 Correct 8 ms 12116 KB Output is correct
10 Correct 8 ms 12116 KB Output is correct
11 Correct 8 ms 12116 KB Output is correct
12 Correct 8 ms 12116 KB Output is correct
13 Correct 9 ms 12244 KB Output is correct
14 Correct 7 ms 12244 KB Output is correct
15 Correct 7 ms 12188 KB Output is correct
16 Correct 7 ms 12244 KB Output is correct
17 Correct 7 ms 12244 KB Output is correct
18 Correct 7 ms 12244 KB Output is correct
19 Correct 33 ms 13820 KB Output is correct
20 Correct 35 ms 13820 KB Output is correct
21 Correct 43 ms 13840 KB Output is correct
22 Correct 46 ms 13984 KB Output is correct
23 Incorrect 64 ms 20880 KB Output isn't correct
24 Halted 0 ms 0 KB -