oj.uz

Submission #340685

# Submission time Handle Problem Language Result Execution time Memory
340685 2020-12-28T07:47:10 Z keta_tsimakuridze Werewolf (IOI18_werewolf) C++14
100 / 100
 2689 ms 204900 KB 
#include "werewolf.h"
#include <cstdio>
#include <cstdlib>
#include <vector>
#include<bits/stdc++.h>
using namespace std;
const int N=2e5+5;
int par[2][N],p[2][N][25],sz[2][N],tmin[2][N],tmout[2][N],timer,Lg,F,bbb,i;
vector<int>v[N],V[2][N],tree[4*N];
vector<pair<int,int> >e[2];
set<int> P[2][N];
namespace {

int read_int() {
  int x;
  if (scanf("%d", &x) != 1) {
    fprintf(stderr, "Error while reading input\n");
    exit(1);
  }
  return x;
}

}  
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
int find_parent(int u,int t){
	if(par[t][u]==u) return u;
	return par[t][u]=find_parent(par[t][u],t);
}
void merge(int u,int v,int t){
	int p1=find_parent(u,t);
	int p2=find_parent(v,t);
	if(p1==p2) return;  
	if(!t)V[t][u].push_back(*P[t][p2].begin()),V[t][*P[t][p2].begin()].push_back(u);
	else V[t][u].push_back(*--P[t][p2].end()),V[t][*--P[t][p2].end()].push_back(u),
	e[1].push_back({u,*--P[t][p2].end()}),e[1].push_back({*--P[t][p2].end(),u});
	if(P[t][p1].size()<P[t][p2].size()) swap(p1,p2);
	while(P[t][p2].size()){
		int cc=*P[t][p2].begin();
		P[t][p1].insert(cc);
		par[t][cc]=p1;
		P[t][p2].erase(cc);
		
	}
}
void dfs(int u,int t){
	timer++;
	tmin[t][u]=timer;  
	for(int j=1;j<Lg;j++){
		p[t][u][j]=p[t][p[t][u][j-1]][j-1];
	}
	for(int i=0;i<V[t][u].size();i++){
		if(p[t][u][0]==V[t][u][i]) continue;
		if(!t && V[t][u][i]<u) cout<<1/bbb<<endl;
		if(t && V[t][u][i]>u) cout<<1/bbb<<endl;
		p[t][V[t][u][i]][0]=u;
		dfs(V[t][u][i],t);
	}
	tmout[t][u]=timer;
}
void update(int u,int ind,int l,int r,int val){
	if(l>ind || r<ind) return;
	if(l==r) {
		tree[u].push_back(val);
		return;
	}
	tree[u].push_back(val);
	if(tree[u].size()==r-l+1) sort(tree[u].begin(),tree[u].end());
	int mid=(l+r)/2;
	update(2*u,ind,l,mid,val);
	update(2*u+1,ind,mid+1,r,val);
}
int getans(int u,int start,int end,int l,int r,int L,int R){
	if(l>end || r<start) return 0; 
	if(l>=start && r<=end){
		int ans=-1; 
		int le=0;int ri=tree[u].size()-1; 
		while(le<=ri){
			int mid=(le+ri)/2; 
			if(tree[u][mid]<L){
				ans=mid; le=mid+1;
			}
			else ri=mid-1;
		} 
		int cnt=ans+1; 
		 ans=tree[u].size();
		 le=0; ri=tree[u].size()-1;
		while(le<=ri){
			int mid=(le+ri)/2;
			if(tree[u][mid]>R){
				ans=mid; ri=mid-1;
			}
			else le=mid+1;
		}
		cnt+=tree[u].size()-ans; 
		return cnt;
	}
	int mid=(l+r)/2;
	return getans(2*u,start,end,l,mid,L,R)+getans(2*u+1,start,end,mid+1,r,L,R);
	
}
int Lca(int u,int m,int t){
	for(int i=Lg;i>=0;i--){
		if(p[t][u][i] && ((!t && p[t][u][i]>=m)||(t && p[t][u][i]<=m))){
			u=p[t][u][i];
		}
	}
	return u;
}
std::vector<int> check_validity(int N, std::vector<int> X, std::vector<int> Y,
                                std::vector<int> S, std::vector<int> E,
                                std::vector<int> L, std::vector<int> R) {
  int M = X.size();
  Lg=log2(N)+1;
  for(int i=1;i<=N;i++)
  for(int j=0;j<=1;j++)
  par[j][i]=i,P[j][i].insert(i);
  for(int i=0;i<M;i++){
  	X[i]++; Y[i]++;
  	v[X[i]].push_back(Y[i]);
  	v[Y[i]].push_back(X[i]);
  } 
  for(int i=N;i>=1;i--){
  	sort(v[i].begin(),v[i].end());
  		for(int j=0;j<v[i].size();j++){
  			int nxt=v[i][j];
  			if(nxt>i){
  				merge(i,nxt,0);
			  }
		  }
  } 
  timer=0;
  dfs(1,0);
   for(int i=1;i<=N;i++){
  	reverse(v[i].begin(),v[i].end());
  		for(int j=0;j<v[i].size();j++){
  			int nxt=v[i][j];
  			if(nxt<i){
  				merge(i,nxt,1);
			  }
		  }
  }
  int Q=S.size();vector<int>Ans(Q);
  timer=0;
  dfs(N,1);
  for(int i=1;i<=N;i++){
  	update(1,tmin[0][i],1,N,tmin[1][i]);
  } 
 
  for(int  i=0;i<Q;i++){
  	S[i]++;
  	E[i]++;
  	L[i]++;
  	R[i]++; F=i;
  	int x=Lca(S[i],L[i],0);
  	int y=Lca(E[i],R[i],1); 
  	if(tmout[0][x]-tmin[0][x]+1-getans(1,tmin[0][x],tmout[0][x],1,N,tmin[1][y],tmout[1][y])) Ans[i]=1;
  	else Ans[i]=0; 
  }
  return Ans; 
}

Compilation message

werewolf.cpp: In function 'void dfs(int, int)':
werewolf.cpp:51:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |  for(int i=0;i<V[t][u].size();i++){
      |              ~^~~~~~~~~~~~~~~
werewolf.cpp: In function 'void update(int, int, int, int, int)':
werewolf.cpp:67:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   67 |  if(tree[u].size()==r-l+1) sort(tree[u].begin(),tree[u].end());
      |     ~~~~~~~~~~~~~~^~~~~~~
werewolf.cpp: In function 'std::vector<int> check_validity(int, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
werewolf.cpp:124:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  124 |     for(int j=0;j<v[i].size();j++){
      |                 ~^~~~~~~~~~~~
werewolf.cpp:135:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  135 |     for(int j=0;j<v[i].size();j++){
      |                 ~^~~~~~~~~~~~
werewolf.cpp: At global scope:
werewolf.cpp:14:5: warning: 'int {anonymous}::read_int()' defined but not used [-Wunused-function]
   14 | int read_int() {
      |     ^~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 52076 KB Output is correct
2 Correct 31 ms 52076 KB Output is correct
3 Correct 31 ms 52076 KB Output is correct
4 Correct 31 ms 52076 KB Output is correct
5 Correct 32 ms 52076 KB Output is correct
6 Correct 31 ms 52096 KB Output is correct
7 Correct 31 ms 52088 KB Output is correct
8 Correct 32 ms 52076 KB Output is correct
9 Correct 30 ms 52204 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 52076 KB Output is correct
2 Correct 31 ms 52076 KB Output is correct
3 Correct 31 ms 52076 KB Output is correct
4 Correct 31 ms 52076 KB Output is correct
5 Correct 32 ms 52076 KB Output is correct
6 Correct 31 ms 52096 KB Output is correct
7 Correct 31 ms 52088 KB Output is correct
8 Correct 32 ms 52076 KB Output is correct
9 Correct 30 ms 52204 KB Output is correct
10 Correct 45 ms 54124 KB Output is correct
11 Correct 44 ms 53996 KB Output is correct
12 Correct 44 ms 53868 KB Output is correct
13 Correct 42 ms 54252 KB Output is correct
14 Correct 42 ms 54252 KB Output is correct
15 Correct 44 ms 54272 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 2618 ms 178652 KB Output is correct
2 Correct 1841 ms 186460 KB Output is correct
3 Correct 1810 ms 181076 KB Output is correct
4 Correct 1812 ms 178772 KB Output is correct
5 Correct 1840 ms 178516 KB Output is correct
6 Correct 2223 ms 178260 KB Output is correct
7 Correct 2517 ms 178792 KB Output is correct
8 Correct 1800 ms 186452 KB Output is correct
9 Correct 1396 ms 181096 KB Output is correct
10 Correct 1533 ms 178772 KB Output is correct
11 Correct 1648 ms 178860 KB Output is correct
12 Correct 2015 ms 178516 KB Output is correct
13 Correct 1605 ms 189524 KB Output is correct
14 Correct 1587 ms 189604 KB Output is correct
15 Correct 1493 ms 189396 KB Output is correct
16 Correct 1519 ms 189480 KB Output is correct
17 Correct 2530 ms 178452 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 52076 KB Output is correct
2 Correct 31 ms 52076 KB Output is correct
3 Correct 31 ms 52076 KB Output is correct
4 Correct 31 ms 52076 KB Output is correct
5 Correct 32 ms 52076 KB Output is correct
6 Correct 31 ms 52096 KB Output is correct
7 Correct 31 ms 52088 KB Output is correct
8 Correct 32 ms 52076 KB Output is correct
9 Correct 30 ms 52204 KB Output is correct
10 Correct 45 ms 54124 KB Output is correct
11 Correct 44 ms 53996 KB Output is correct
12 Correct 44 ms 53868 KB Output is correct
13 Correct 42 ms 54252 KB Output is correct
14 Correct 42 ms 54252 KB Output is correct
15 Correct 44 ms 54272 KB Output is correct
16 Correct 2618 ms 178652 KB Output is correct
17 Correct 1841 ms 186460 KB Output is correct
18 Correct 1810 ms 181076 KB Output is correct
19 Correct 1812 ms 178772 KB Output is correct
20 Correct 1840 ms 178516 KB Output is correct
21 Correct 2223 ms 178260 KB Output is correct
22 Correct 2517 ms 178792 KB Output is correct
23 Correct 1800 ms 186452 KB Output is correct
24 Correct 1396 ms 181096 KB Output is correct
25 Correct 1533 ms 178772 KB Output is correct
26 Correct 1648 ms 178860 KB Output is correct
27 Correct 2015 ms 178516 KB Output is correct
28 Correct 1605 ms 189524 KB Output is correct
29 Correct 1587 ms 189604 KB Output is correct
30 Correct 1493 ms 189396 KB Output is correct
31 Correct 1519 ms 189480 KB Output is correct
32 Correct 2530 ms 178452 KB Output is correct
33 Correct 2578 ms 184608 KB Output is correct
34 Correct 438 ms 83948 KB Output is correct
35 Correct 2605 ms 189524 KB Output is correct
36 Correct 2518 ms 183500 KB Output is correct
37 Correct 2617 ms 187992 KB Output is correct
38 Correct 2545 ms 184688 KB Output is correct
39 Correct 1926 ms 204756 KB Output is correct
40 Correct 2056 ms 194268 KB Output is correct
41 Correct 2439 ms 187292 KB Output is correct
42 Correct 2296 ms 183548 KB Output is correct
43 Correct 2689 ms 195464 KB Output is correct
44 Correct 2561 ms 188132 KB Output is correct
45 Correct 1969 ms 204900 KB Output is correct
46 Correct 2235 ms 204628 KB Output is correct
47 Correct 1618 ms 193236 KB Output is correct
48 Correct 1574 ms 193364 KB Output is correct
49 Correct 1527 ms 193508 KB Output is correct
50 Correct 1527 ms 193108 KB Output is correct
51 Correct 1967 ms 195156 KB Output is correct
52 Correct 1935 ms 194916 KB Output is correct