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답안 #126445

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
126445 2019-07-07T18:36:04 Z TadijaSebez Designated Cities (JOI19_designated_cities) C++11
56 / 100
 574 ms 57208 KB 
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
const int N=200050;
vector<pair<int,int>> E[N];
ll sum[N],all_up;
int up[N],down[N];
ll dep[N];
int lid[N],rid[N],tid,nod[N],par[N],my[N],rt,n;
ll mxd[N],sol[N];
void DFS(int u, int p)
{
	for(auto e:E[u])
	{
		int v=e.first,w=e.second;
		if(v==p) up[u]=w,all_up+=w;
	}
	if(p) sum[u]=sum[p]+down[u]-up[u];
	mxd[u]=dep[u];
	for(auto e:E[u])
	{
		int v=e.first,w=e.second;
		if(v!=p)
		{
			down[v]=w;
			dep[v]=dep[u]+w;
			DFS(v,u);
			mxd[u]=max(mxd[u],mxd[v]);
		}
	}
}
void Solve(int u, int p, ll hi)
{
	ll fir=0,sec=0;
	sol[u]=max(hi,mxd[u]-dep[u])+sum[u];
	for(auto e:E[u]) if(e.first!=p)
	{
		int v=e.first,w=e.second;
		if(fir<mxd[v]) sec=fir,fir=mxd[v];
		else if(sec<mxd[v]) sec=mxd[v];
	}
	for(auto e:E[u]) if(e.first!=p)
	{
		int v=e.first,w=e.second;
		ll best=hi;
		if(fir==mxd[v]) best=max(best,sec);
		else best=max(best,fir);
		Solve(v,u,best+up[v]);
	}
}
void DFS2(int u, int p)
{
	lid[u]=++tid;
	nod[tid]=u;
	par[u]=p;
	my[u]=u;
	for(auto e:E[u]) if(e.first!=p)
	{
		int v=e.first;
		dep[v]=dep[u]+e.second;
		DFS2(v,u);
		if(dep[my[u]]<dep[my[v]]) my[u]=my[v];
	}
	rid[u]=tid;
}
const int M=2*N;
int ls[M],rs[M],tsz,root,id[M];
ll mx[M],lzy[M];
void Build(int &c, int ss, int se)
{
	c=++tsz;
	if(ss==se){ mx[c]=dep[nod[ss]];id[c]=nod[ss];return;}
	int mid=ss+se>>1;
	Build(ls[c],ss,mid);
	Build(rs[c],mid+1,se);
	mx[c]=max(mx[ls[c]],mx[rs[c]]);
	if(mx[c]==mx[ls[c]]) id[c]=id[ls[c]];
	else id[c]=id[rs[c]];
	//printf("%i %lld %i\n",c,mx[c],id[c]);
}
void Add(int c, int ss, int se, int qs, int qe, ll x)
{
	if(qs>qe || qs>se || ss>qe) return;
	if(qs<=ss && qe>=se){ mx[c]+=x;lzy[c]+=x;return;}
	int mid=ss+se>>1;
	Add(ls[c],ss,mid,qs,qe,x);
	Add(rs[c],mid+1,se,qs,qe,x);
	mx[c]=max(mx[ls[c]],mx[rs[c]]);
	if(mx[c]==mx[ls[c]]) id[c]=id[ls[c]];
	else id[c]=id[rs[c]];
	mx[c]+=lzy[c];
}
bool was[N];
ll ans[N],cur;
void Add(int x)
{
	for(;x!=rt;x=par[x])
	{
		if(was[x]) break;
		was[x]=1;
		Add(root,1,n,lid[x],rid[x],-dep[x]+dep[par[x]]);
		cur+=dep[x]-dep[par[x]];
	}
}
int main()
{
	int q,u,v,c,d;
	scanf("%i",&n);
	ll z=0;
	for(int i=1;i<n;i++)
	{
		scanf("%i %i %i %i",&u,&v,&c,&d);
		E[u].pb({v,c});
		E[v].pb({u,d});
		z+=c+d;
	}
	DFS(1,0);
	rt=1;
	for(int i=1;i<=n;i++)
	{
		sum[i]+=all_up;
		if(sum[i]>sum[rt]) rt=i;
	}
	ans[1]=sum[rt];
	Solve(1,0,0);
	for(int i=1;i<=n;i++) if(sol[i]>sol[rt]) rt=i;
	for(int i=1;i<=n;i++) dep[i]=0;
	DFS2(rt,0);
    Build(root,1,n);
    cur=sum[rt];
    //printf("cur:%lld\n",cur);
    /*int fir=0,sec=0;
    for(auto e:E[rt])
	{
		v=e.first;
		if(dep[my[v]]>dep[fir]) sec=fir,fir=my[v];
		else if(dep[my[v]]>dep[sec]) sec=my[v];
	}
	Add(fir);
	if(sec) Add(sec);*/
	for(int i=2;i<=n;i++)
	{
		//printf("%i: %i\n",i,id[root]);
		Add(id[root]);
		ans[i]=cur;
	}
	scanf("%i",&q);
	while(q--)
	{
		int x;
		scanf("%i",&x);
		printf("%lld\n",z-ans[x]);
	}
	return 0;
}

Compilation message

designated_cities.cpp: In function 'void Solve(int, int, long long int)':
designated_cities.cpp:39:17: warning: unused variable 'w' [-Wunused-variable]
   int v=e.first,w=e.second;
                 ^
designated_cities.cpp:45:17: warning: unused variable 'w' [-Wunused-variable]
   int v=e.first,w=e.second;
                 ^
designated_cities.cpp: In function 'void Build(int&, int, int)':
designated_cities.cpp:74:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
designated_cities.cpp: In function 'void Add(int, int, int, int, int, long long int)':
designated_cities.cpp:86:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid=ss+se>>1;
          ~~^~~
designated_cities.cpp: In function 'int main()':
designated_cities.cpp:109:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
designated_cities.cpp:113:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i %i %i %i",&u,&v,&c,&d);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:148:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&q);
  ~~~~~^~~~~~~~~
designated_cities.cpp:152:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i",&x);
   ~~~~~^~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5116 KB Output is correct
2 Correct 6 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 6 ms 5112 KB Output is correct
9 Correct 6 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5116 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 432 ms 36784 KB Output is correct
3 Correct 436 ms 48636 KB Output is correct
4 Correct 417 ms 36856 KB Output is correct
5 Correct 453 ms 36744 KB Output is correct
6 Correct 503 ms 38508 KB Output is correct
7 Correct 437 ms 36876 KB Output is correct
8 Correct 486 ms 49016 KB Output is correct
9 Correct 385 ms 37476 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 477 ms 36764 KB Output is correct
3 Correct 485 ms 57080 KB Output is correct
4 Correct 552 ms 41804 KB Output is correct
5 Correct 479 ms 43304 KB Output is correct
6 Correct 512 ms 45176 KB Output is correct
7 Correct 408 ms 43636 KB Output is correct
8 Correct 502 ms 51064 KB Output is correct
9 Correct 422 ms 43760 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5116 KB Output is correct
2 Correct 6 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 6 ms 5112 KB Output is correct
9 Correct 6 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5116 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 9 ms 5496 KB Output is correct
14 Correct 9 ms 5624 KB Output is correct
15 Correct 9 ms 5496 KB Output is correct
16 Correct 9 ms 5496 KB Output is correct
17 Correct 9 ms 5496 KB Output is correct
18 Correct 9 ms 5496 KB Output is correct
19 Correct 9 ms 5496 KB Output is correct
20 Correct 9 ms 5496 KB Output is correct
21 Correct 9 ms 5496 KB Output is correct
22 Correct 9 ms 5496 KB Output is correct
23 Correct 9 ms 5496 KB Output is correct
24 Correct 9 ms 5500 KB Output is correct
25 Correct 9 ms 5624 KB Output is correct
26 Correct 9 ms 5624 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5112 KB Output is correct
2 Correct 432 ms 36784 KB Output is correct
3 Correct 436 ms 48636 KB Output is correct
4 Correct 417 ms 36856 KB Output is correct
5 Correct 453 ms 36744 KB Output is correct
6 Correct 503 ms 38508 KB Output is correct
7 Correct 437 ms 36876 KB Output is correct
8 Correct 486 ms 49016 KB Output is correct
9 Correct 385 ms 37476 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 477 ms 36764 KB Output is correct
12 Correct 485 ms 57080 KB Output is correct
13 Correct 552 ms 41804 KB Output is correct
14 Correct 479 ms 43304 KB Output is correct
15 Correct 512 ms 45176 KB Output is correct
16 Correct 408 ms 43636 KB Output is correct
17 Correct 502 ms 51064 KB Output is correct
18 Correct 422 ms 43760 KB Output is correct
19 Correct 6 ms 5112 KB Output is correct
20 Correct 499 ms 43216 KB Output is correct
21 Correct 439 ms 57208 KB Output is correct
22 Correct 379 ms 41800 KB Output is correct
23 Correct 574 ms 43256 KB Output is correct
24 Correct 487 ms 42220 KB Output is correct
25 Correct 490 ms 43312 KB Output is correct
26 Correct 458 ms 42044 KB Output is correct
27 Correct 450 ms 43252 KB Output is correct
28 Correct 501 ms 44888 KB Output is correct
29 Correct 458 ms 43256 KB Output is correct
30 Correct 519 ms 42484 KB Output is correct
31 Correct 445 ms 43368 KB Output is correct
32 Correct 497 ms 51660 KB Output is correct
33 Correct 415 ms 43876 KB Output is correct

Subtask #6
0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 5116 KB Output is correct
2 Correct 6 ms 5112 KB Output is correct
3 Correct 6 ms 5112 KB Output is correct
4 Correct 6 ms 5112 KB Output is correct
5 Correct 6 ms 5112 KB Output is correct
6 Correct 6 ms 5112 KB Output is correct
7 Correct 6 ms 5112 KB Output is correct
8 Correct 6 ms 5112 KB Output is correct
9 Correct 6 ms 5112 KB Output is correct
10 Correct 6 ms 5112 KB Output is correct
11 Correct 6 ms 5116 KB Output is correct
12 Correct 6 ms 5112 KB Output is correct
13 Correct 432 ms 36784 KB Output is correct
14 Correct 436 ms 48636 KB Output is correct
15 Correct 417 ms 36856 KB Output is correct
16 Correct 453 ms 36744 KB Output is correct
17 Correct 503 ms 38508 KB Output is correct
18 Correct 437 ms 36876 KB Output is correct
19 Correct 486 ms 49016 KB Output is correct
20 Correct 385 ms 37476 KB Output is correct
21 Correct 6 ms 5112 KB Output is correct
22 Correct 477 ms 36764 KB Output is correct
23 Correct 485 ms 57080 KB Output is correct
24 Correct 552 ms 41804 KB Output is correct
25 Correct 479 ms 43304 KB Output is correct
26 Correct 512 ms 45176 KB Output is correct
27 Correct 408 ms 43636 KB Output is correct
28 Correct 502 ms 51064 KB Output is correct
29 Correct 422 ms 43760 KB Output is correct
30 Correct 6 ms 5112 KB Output is correct
31 Correct 9 ms 5496 KB Output is correct
32 Correct 9 ms 5624 KB Output is correct
33 Correct 9 ms 5496 KB Output is correct
34 Correct 9 ms 5496 KB Output is correct
35 Correct 9 ms 5496 KB Output is correct
36 Correct 9 ms 5496 KB Output is correct
37 Correct 9 ms 5496 KB Output is correct
38 Correct 9 ms 5496 KB Output is correct
39 Correct 9 ms 5496 KB Output is correct
40 Correct 9 ms 5496 KB Output is correct
41 Correct 9 ms 5496 KB Output is correct
42 Correct 9 ms 5500 KB Output is correct
43 Correct 9 ms 5624 KB Output is correct
44 Correct 9 ms 5624 KB Output is correct
45 Correct 6 ms 5112 KB Output is correct
46 Correct 499 ms 43216 KB Output is correct
47 Correct 439 ms 57208 KB Output is correct
48 Correct 379 ms 41800 KB Output is correct
49 Correct 574 ms 43256 KB Output is correct
50 Correct 487 ms 42220 KB Output is correct
51 Correct 490 ms 43312 KB Output is correct
52 Correct 458 ms 42044 KB Output is correct
53 Correct 450 ms 43252 KB Output is correct
54 Correct 501 ms 44888 KB Output is correct
55 Correct 458 ms 43256 KB Output is correct
56 Correct 519 ms 42484 KB Output is correct
57 Correct 445 ms 43368 KB Output is correct
58 Correct 497 ms 51660 KB Output is correct
59 Correct 415 ms 43876 KB Output is correct
60 Correct 6 ms 5112 KB Output is correct
61 Incorrect 521 ms 45780 KB Output isn't correct
62 Halted 0 ms 0 KB -