oj.uz

답안 #419536

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
419536 2021-06-07T08:49:47 Z mosiashvililuka Zagrade (COI17_zagrade) C++17
40 / 100
 3000 ms 61680 KB 
#include<bits/stdc++.h>
using namespace std;
long long a,b,c,d,e,i,j,ii,jj,zx,xc,bo[300009],cnt,p[300009],pi,msh[300009],dp[300009],pas;
vector <long long> v[300009];
long long A[300009],Ai,Bi;
pair <long long, long long> B[300009];
vector <long long> vv[300009];
long long fx[300009];
string s;
char ch;
void dfs(long long q, long long w){
	pi++;p[pi]=q;
	msh[q]=w;
	dp[q]=1;
	for(vector <long long>::iterator it=v[q].begin(); it!=v[q].end(); it++){
		if((*it)==w||bo[(*it)]==1) continue;
		dfs((*it),q);
		dp[q]+=dp[(*it)];
	}
}
void dfs2(long long q, long long w, long long rr, long long mn){
	long long RR,MN;
	if(s[q]=='('){
		RR=rr+1;MN=min(1LL,mn+1);
	}else{
		RR=rr-1;MN=min(-1LL,mn-1);
	}
	if(MN>=0){
		Ai++;A[Ai]=RR;
	}
	for(vector <long long>::iterator it=v[q].begin(); it!=v[q].end(); it++){
		if((*it)==w||bo[(*it)]==1) continue;
		dfs2((*it),q,RR,MN);
	}
}
void dfs3(long long q, long long w, long long rr, long long mn, long long mn2){
	long long RR,MN,MN2;
	if(s[q]==')'){
		RR=rr+1;MN=min(1LL,mn+1);
		MN2=max(mn2,RR);
	}else{
		RR=rr-1;MN=min(-1LL,mn-1);
		MN2=max(mn2,RR);
	}
	if(MN>=0){
		Bi++;
		B[Bi].first=RR;B[Bi].second=MN2;
	}
	for(vector <long long>::iterator it=v[q].begin(); it!=v[q].end(); it++){
		if((*it)==w||bo[(*it)]==1) continue;
		dfs3((*it),q,RR,MN,MN2);
	}
}
long long fun(){
	long long sm=0;
	for(i=1; i<=Bi; i++){
		if(fx[B[i].first]!=cnt){
			fx[B[i].first]=cnt;vv[B[i].first].clear();
		}
		vv[B[i].first].push_back(B[i].second);
	}
	for(i=1; i<=Bi; i++){
		if(i!=1&&B[i-1].first==B[i].first) continue;
		sort(vv[B[i].first].begin(),vv[B[i].first].end());
	}
	for(i=1; i<=Ai; i++){
		if(fx[A[i]]!=cnt) continue;
		c=lower_bound(vv[A[i]].begin(),vv[A[i]].end(),A[i]+1)-vv[A[i]].begin();
		sm+=c;
	}
	return sm;
}
void dfsa(long long q, long long w, long long rr){
	if(s[q]=='('){
		rr++;
	}else{
		rr--;
	}
	if(rr<0) return;
	if(rr==0) pas++;
	for(vector <long long>::iterator it=v[q].begin(); it!=v[q].end(); it++){
		if((*it)==w||bo[(*it)]==1) continue;
		dfsa((*it),q,rr);
	}
}
void dfsb(long long q, long long w, long long rr){
	if(s[q]==')'){
		rr++;
	}else{
		rr--;
	}
	if(rr<0) return;
	if(rr==0) pas++;
	for(vector <long long>::iterator it=v[q].begin(); it!=v[q].end(); it++){
		if((*it)==w||bo[(*it)]==1) continue;
		dfsb((*it),q,rr);
	}
}
void rec(long long q){
	pi=0;
	dfs(q,0);
	long long zz=0;
	for(long long h=1; h<=pi; h++){
		bool boo=0;
		for(vector <long long>::iterator it=v[p[h]].begin(); it!=v[p[h]].end(); it++){
			if((*it)==msh[p[h]]||bo[(*it)]==1) continue;
			if(dp[(*it)]>pi/2){
				boo=1;
				break;
			}
		}
		if(pi-dp[p[h]]>pi/2) boo=1;
		if(boo==0){
			zz=p[h];
			break;
		}
	}
	//cout<<q<<" A "<<zz<<endl;
	Ai=0;Bi=0;
	/*if(s[zz]=='('){
		Ai++;
		A[Ai]=1;
	}*/
	for(vector <long long>::iterator it=v[zz].begin(); it!=v[zz].end(); it++){
		if(bo[(*it)]==1) continue;
		if(s[zz]=='('){
			dfsa((*it),zz,1);
		}else{
			dfsb((*it),zz,1);
		}
	}
	//cout<<pas<<endl;
	for(vector <long long>::iterator it=v[zz].begin(); it!=v[zz].end(); it++){
		if(bo[(*it)]==1) continue;
		long long as=0,sd=0;
		if(s[zz]=='('){
			as=1;sd=1;
		}else{
			as=-1;sd=-1;
		}
		dfs2((*it),zz,as,sd);
		dfs3((*it),zz,0,0,0);
	}
	cnt++;
	pas+=fun();
	for(vector <long long>::iterator it=v[zz].begin(); it!=v[zz].end(); it++){
		if(bo[(*it)]==1) continue;
		Ai=0;Bi=0;
		long long as=0,sd=0;
		if(s[zz]=='('){
			as=1;sd=1;
			/*Ai++;
			A[Ai]=1;*/
		}else{
			as=-1;sd=-1;
		}
		dfs2((*it),zz,as,sd);
		dfs3((*it),zz,0,0,0);
		cnt++;
		pas-=fun();
	}
	bo[zz]=1;
	//cout<<q<<" B "<<zz<<endl;
	//cout<<pas<<endl;
	for(vector <long long>::iterator it=v[zz].begin(); it!=v[zz].end(); it++){
		if(bo[(*it)]==1) continue;
		rec((*it));
	}
	//cout<<q<<" C "<<zz<<endl;
}
int main(){
	ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
	//cin>>a;
	scanf("%llu\n",&a);
	/*cin>>s;
	s.insert(0,"0");*/
	s+="0";
	for(i=1; i<=a; i++){
		ch=getchar();
		s.push_back(ch);
	}
	for(i=1; i<a; i++){
		//cin>>c>>d;
		if(i!=a-1) scanf("%llu %llu\n",&c,&d); else scanf("%llu %llu",&c,&d);
		v[c].push_back(d);
		v[d].push_back(c);
	}
	rec(1);
	//cout<<pas;
	printf("%llu",pas);
	return 0;
}

Compilation message

zagrade.cpp: In function 'int main()':
zagrade.cpp:174:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  174 |  scanf("%llu\n",&a);
      |  ~~~~~^~~~~~~~~~~~~
zagrade.cpp:184:19: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  184 |   if(i!=a-1) scanf("%llu %llu\n",&c,&d); else scanf("%llu %llu",&c,&d);
      |              ~~~~~^~~~~~~~~~~~~~~~~~~~~
zagrade.cpp:184:52: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  184 |   if(i!=a-1) scanf("%llu %llu\n",&c,&d); else scanf("%llu %llu",&c,&d);
      |                                               ~~~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 14540 KB Output is correct
2 Correct 10 ms 14540 KB Output is correct
3 Correct 10 ms 14540 KB Output is correct
4 Correct 10 ms 14552 KB Output is correct
5 Correct 10 ms 14540 KB Output is correct
6 Correct 10 ms 14524 KB Output is correct
7 Correct 10 ms 14540 KB Output is correct
8 Correct 10 ms 14540 KB Output is correct
9 Correct 10 ms 14536 KB Output is correct
10 Correct 9 ms 14540 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 601 ms 52300 KB Output is correct
2 Correct 737 ms 59036 KB Output is correct
3 Correct 590 ms 52416 KB Output is correct
4 Correct 733 ms 57796 KB Output is correct
5 Correct 602 ms 52304 KB Output is correct
6 Correct 608 ms 52836 KB Output is correct
7 Correct 595 ms 52340 KB Output is correct
8 Correct 583 ms 52776 KB Output is correct
9 Correct 599 ms 52324 KB Output is correct
10 Correct 593 ms 61680 KB Output is correct
11 Correct 675 ms 57260 KB Output is correct

Subtask #3
0 / 60.0

# 결과 실행 시간 메모리 Grader output
1 Correct 11 ms 14540 KB Output is correct
2 Correct 10 ms 14540 KB Output is correct
3 Correct 10 ms 14540 KB Output is correct
4 Correct 10 ms 14552 KB Output is correct
5 Correct 10 ms 14540 KB Output is correct
6 Correct 10 ms 14524 KB Output is correct
7 Correct 10 ms 14540 KB Output is correct
8 Correct 10 ms 14540 KB Output is correct
9 Correct 10 ms 14536 KB Output is correct
10 Correct 9 ms 14540 KB Output is correct
11 Correct 601 ms 52300 KB Output is correct
12 Correct 737 ms 59036 KB Output is correct
13 Correct 590 ms 52416 KB Output is correct
14 Correct 733 ms 57796 KB Output is correct
15 Correct 602 ms 52304 KB Output is correct
16 Correct 608 ms 52836 KB Output is correct
17 Correct 595 ms 52340 KB Output is correct
18 Correct 583 ms 52776 KB Output is correct
19 Correct 599 ms 52324 KB Output is correct
20 Correct 593 ms 61680 KB Output is correct
21 Correct 675 ms 57260 KB Output is correct
22 Execution timed out 3047 ms 37156 KB Time limit exceeded
23 Halted 0 ms 0 KB -