oj.uz

Submission #136920

# Submission time Handle Problem Language Result Execution time Memory
136920 2019-07-26T14:15:42 Z hamzqq9 Unique Cities (JOI19_ho_t5) C++14
4 / 100
 2000 ms 39160 KB 
#include<bits/stdc++.h>
#define st first
#define nd second
#define pb push_back
#define ppb pop_back
#define ii pair<int,int>
#define ll long long
#define umin(x,y) x=min(x,y)
#define umax(x,y) x=max(x,y)
#define orta ((bas+son)>>1)
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define inf 2000000000
#define N 200005
#define MOD 998244353
using namespace std;

int n,m;
int mxd[N][2],der[N];
int ans[N],c[N],deep[N];
int s[N];
int sz;
int tot_op;
int cntd;
int has[N];
int cnt[N];
vector<int> v[N];

struct diameter_finder {

	int l,r;
	int mx;

	void dfs(int node,int ata,int len) {

		if(len>mx) {

			mx=len;
			l=node;

		}

		for(int i:v[node]) {

			if(i==ata) continue ;

			dfs(i,node,len+1);

		}

	}
 
	void find() {

		mx=0;

		dfs(1,0,0);

		r=l;

		mx=0;

		dfs(r,0,0);

	}

} dia;

void rollback(vector<int>& roll) {

	while(!roll.empty()) {

		int x=roll.back();

		roll.ppb();

		++tot_op;

		s[++sz]=x;

		cntd+=(cnt[c[has[x]]]==0);

		cnt[c[has[x]]]++;

	}

}

void add(int node) {

	has[der[node]]=node;

	s[++sz]=der[node];

	++tot_op;

	cntd+=(cnt[c[node]]==0);

	cnt[c[node]]++;

}

void del(vector<int>& roll,int cur) {

	while(sz && cur<=s[sz]) {

		++tot_op;

		roll.pb(s[sz]);

		cnt[c[has[s[sz]]]]--;

		cntd-=(cnt[c[has[s[sz]]]]==0);

		--sz;

	}

}

void upd(int node,int nd) {

	if(mxd[node][1]<nd) mxd[node][1]=nd;

	if(mxd[node][1]>mxd[node][0]) swap(mxd[node][1],mxd[node][0]);

}

vector<int> temp;

void dfs(int node,int ata) {

//	cerr << "node is : " << node <<'\n';

//	for(auto x:s) cerr << x.st << ' ' << x.nd << '\n';

	vector<int> roll;

//	cerr << "roll upto : " << 2*der[node]-mxd[node][0] << "\n";

	del(roll,2*der[node]-mxd[node][1]);

	add(node);

	for(int i:v[node]) {

		if(i!=deep[node]) continue ;

		dfs(i,node);

	}

	del(temp,der[node]); 

	del(roll,2*der[node]-mxd[node][0]);

	add(node);

	for(int i:v[node]) {

		if(i==ata || i==deep[node]) continue ;

		dfs(i,node);

	}

	del(temp,der[node]);

	umax(ans[node],cntd);

	rollback(roll);

}

void dfs1(int node,int ata) {

	der[node]=der[ata]+1;

	mxd[node][0]=mxd[node][1]=der[node];
	deep[node]=node;

	for(int i:v[node]) {

		if(i==ata) continue ;

		dfs1(i,node);

		upd(node,mxd[i][0]);

		if(mxd[node][0]==mxd[i][0]) {

			deep[node]=i;

		}

	}

}

int main() {

	scanf("%d %d",&n,&m);

	for(int i=1;i<n;i++) {

		int x,y;

		scanf("%d %d",&x,&y);

		v[x].pb(y);
		v[y].pb(x);

	}

	for(int i=1;i<=n;i++) scanf("%d",c+i);

	dia.find();

//	cerr << "root is : " << dia.l << '\n';

	dfs1(dia.l,0);
	dfs(dia.l,0);

//	cerr << "root is : " << dia.r << '\n';

	dfs1(dia.r,0);
	dfs(dia.r,0);

	for(int i=1;i<=n;i++) printf("%d\n",ans[i]);

//	cerr << tot_op << '\n';

}

Compilation message

joi2019_ho_t5.cpp: In function 'int main()':
joi2019_ho_t5.cpp:202:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d",&n,&m);
  ~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t5.cpp:208:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&x,&y);
   ~~~~~^~~~~~~~~~~~~~~
joi2019_ho_t5.cpp:215:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1;i<=n;i++) scanf("%d",c+i);
                        ~~~~~^~~~~~~~~~

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 8 ms 5244 KB Output is correct
3 Correct 18 ms 5208 KB Output is correct
4 Correct 18 ms 5368 KB Output is correct
5 Correct 8 ms 5240 KB Output is correct
6 Correct 54 ms 5496 KB Output is correct
7 Correct 20 ms 5372 KB Output is correct
8 Correct 8 ms 5240 KB Output is correct
9 Correct 8 ms 5244 KB Output is correct
10 Correct 8 ms 5240 KB Output is correct
11 Correct 9 ms 5264 KB Output is correct
12 Correct 8 ms 5244 KB Output is correct
13 Correct 46 ms 5368 KB Output is correct
14 Correct 12 ms 5240 KB Output is correct
15 Correct 12 ms 5240 KB Output is correct
16 Correct 8 ms 5240 KB Output is correct
17 Correct 29 ms 5368 KB Output is correct
18 Correct 20 ms 5384 KB Output is correct
19 Correct 8 ms 5240 KB Output is correct
20 Correct 53 ms 5624 KB Output is correct
21 Correct 20 ms 5368 KB Output is correct
22 Correct 8 ms 5240 KB Output is correct
23 Correct 9 ms 5240 KB Output is correct
24 Correct 8 ms 5240 KB Output is correct
25 Correct 11 ms 5240 KB Output is correct
26 Correct 8 ms 5240 KB Output is correct
27 Correct 28 ms 5496 KB Output is correct
28 Correct 23 ms 5368 KB Output is correct
29 Correct 15 ms 5368 KB Output is correct
30 Correct 7 ms 5240 KB Output is correct
31 Correct 31 ms 5368 KB Output is correct
32 Correct 21 ms 5368 KB Output is correct

Subtask #2
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 234 ms 13772 KB Output is correct
2 Execution timed out 2064 ms 25108 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #3
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 361 ms 18732 KB Output is correct
2 Execution timed out 2078 ms 39160 KB Time limit exceeded
3 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 8 ms 5244 KB Output is correct
3 Correct 18 ms 5208 KB Output is correct
4 Correct 18 ms 5368 KB Output is correct
5 Correct 8 ms 5240 KB Output is correct
6 Correct 54 ms 5496 KB Output is correct
7 Correct 20 ms 5372 KB Output is correct
8 Correct 8 ms 5240 KB Output is correct
9 Correct 8 ms 5244 KB Output is correct
10 Correct 8 ms 5240 KB Output is correct
11 Correct 9 ms 5264 KB Output is correct
12 Correct 8 ms 5244 KB Output is correct
13 Correct 46 ms 5368 KB Output is correct
14 Correct 12 ms 5240 KB Output is correct
15 Correct 12 ms 5240 KB Output is correct
16 Correct 8 ms 5240 KB Output is correct
17 Correct 29 ms 5368 KB Output is correct
18 Correct 20 ms 5384 KB Output is correct
19 Correct 8 ms 5240 KB Output is correct
20 Correct 53 ms 5624 KB Output is correct
21 Correct 20 ms 5368 KB Output is correct
22 Correct 8 ms 5240 KB Output is correct
23 Correct 9 ms 5240 KB Output is correct
24 Correct 8 ms 5240 KB Output is correct
25 Correct 11 ms 5240 KB Output is correct
26 Correct 8 ms 5240 KB Output is correct
27 Correct 28 ms 5496 KB Output is correct
28 Correct 23 ms 5368 KB Output is correct
29 Correct 15 ms 5368 KB Output is correct
30 Correct 7 ms 5240 KB Output is correct
31 Correct 31 ms 5368 KB Output is correct
32 Correct 21 ms 5368 KB Output is correct
33 Correct 234 ms 13772 KB Output is correct
34 Execution timed out 2064 ms 25108 KB Time limit exceeded
35 Halted 0 ms 0 KB -