oj.uz

답안 #922071

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
922071 2024-02-05T01:45:35 Z firewater Election Campaign (JOI15_election_campaign) C++14
100 / 100
 87 ms 27628 KB 
#include<bits/stdc++.h>
#define fs first
#define sn second
#define mp make_pair
#define N 100100
#define ll long long
using namespace std;
ll n,m,ans,x,y,z,w,tot,h[N],f[N],fr[N],sz[N],hs[N],top[N],fa[N],dep[N],dfn[N],low[N],v[N];
vector<pair<pair<ll,ll>,ll> >d[N];
struct rec
{
	ll to,nx;
}e[N<<1];
void addl(ll x,ll y)
{
	e[++tot].to=y;
	e[tot].nx=h[x];
	h[x]=tot;
	return;
}
struct TT
{
	ll sum[N];
	void add(ll y,ll z)
	{
		sum[y]+=z;
		return;
	}
	ll ask(ll l,ll r)
	{
		return sum[l]-(hs[fr[r]]?sum[r+1]:0);
	}
}T;
void dfs(ll x)
{
	sz[x]=1;
	for(ll i=h[x];i;i=e[i].nx){
		ll y=e[i].to;
		if(y==fa[x])continue;
		fa[y]=x;
		dep[y]=dep[x]+1;
		dfs(y);
		sz[x]+=sz[y];
		if(sz[y]>sz[hs[x]])hs[x]=y;
	}
	return;
}
void dfs1(ll x,ll anc)
{
	dfn[x]=++w;
	fr[w]=x;
	top[x]=anc;
	if(hs[x])dfs1(hs[x],anc);
	for(ll i=h[x];i;i=e[i].nx){
		ll y=e[i].to;
		if(y==fa[x]||y==hs[x])continue;
		dfs1(y,y);
	}
	low[x]=w;
	return;
}
ll lca(ll x,ll y)
{
	while(top[x]!=top[y]){
		if(dep[top[x]]<dep[top[y]])swap(x,y);
		x=fa[top[x]];
	}
	return (dep[x]<dep[y]?x:y);
}
ll ask(ll x,ll y)
{
	ll sum=0;
	while(top[x]!=top[y]){
		if(dep[top[x]]<dep[top[y]])swap(x,y);
		if(hs[x])sum+=f[hs[x]];
		sum+=T.ask(dfn[top[x]],dfn[x])-f[top[x]];
		x=fa[top[x]];
	}
	if(dep[x]>dep[y])swap(x,y);
	if(hs[y])sum+=f[hs[y]];
	sum+=T.ask(dfn[x],dfn[y]);
	return sum;
}
bool cmp(ll x,ll y)
{
	return dep[x]>dep[y];
}
int main()
{
	scanf("%lld",&n);
	for(ll i=1;i<n;++i){
		scanf("%lld%lld",&x,&y);
		addl(x,y);
		addl(y,x);
	}
	fa[1]=1;
	dep[1]=1;
	dfs(1);
	dfs1(1,1);
	scanf("%lld",&m);
	for(ll i=1;i<=m;++i){
		scanf("%lld%lld%lld",&x,&y,&z);
		ll u=lca(x,y);
		d[u].push_back(mp(mp(x,y),z));
	}
	for(ll i=1;i<=n;++i)
		v[i]=i;
	sort(v+1,v+1+n,cmp);
	for(ll i=1;i<=n;++i){
		x=v[i];
		if(hs[x])T.add(dfn[x],T.sum[dfn[x]+1]);
		f[x]=ask(x,x);
		for(ll j=0;j<d[x].size();++j){
			f[x]=max(f[x],ask(d[x][j].fs.fs,d[x][j].fs.sn)+d[x][j].sn);
		}
		ans=max(ans,f[x]);
		if(x!=1&&x==top[x])T.add(dfn[fa[x]],f[x]);
	}
	printf("%lld\n",ans);
	return 0;
}

Compilation message

election_campaign.cpp: In function 'int main()':
election_campaign.cpp:113:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<std::pair<long long int, long long int>, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  113 |   for(ll j=0;j<d[x].size();++j){
      |              ~^~~~~~~~~~~~
election_campaign.cpp:90:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   90 |  scanf("%lld",&n);
      |  ~~~~~^~~~~~~~~~~
election_campaign.cpp:92:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   92 |   scanf("%lld%lld",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~
election_campaign.cpp:100:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |  scanf("%lld",&m);
      |  ~~~~~^~~~~~~~~~~
election_campaign.cpp:102:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  102 |   scanf("%lld%lld%lld",&x,&y,&z);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12632 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12764 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 38 ms 16280 KB Output is correct
6 Correct 29 ms 22612 KB Output is correct
7 Correct 40 ms 20344 KB Output is correct
8 Correct 30 ms 16212 KB Output is correct
9 Correct 38 ms 19240 KB Output is correct
10 Correct 26 ms 16212 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12736 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 55 ms 27368 KB Output is correct
5 Correct 55 ms 27356 KB Output is correct
6 Correct 52 ms 27220 KB Output is correct
7 Correct 53 ms 27216 KB Output is correct
8 Correct 57 ms 27392 KB Output is correct
9 Correct 52 ms 27320 KB Output is correct
10 Correct 59 ms 27176 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12636 KB Output is correct
2 Correct 2 ms 12736 KB Output is correct
3 Correct 2 ms 12636 KB Output is correct
4 Correct 55 ms 27368 KB Output is correct
5 Correct 55 ms 27356 KB Output is correct
6 Correct 52 ms 27220 KB Output is correct
7 Correct 53 ms 27216 KB Output is correct
8 Correct 57 ms 27392 KB Output is correct
9 Correct 52 ms 27320 KB Output is correct
10 Correct 59 ms 27176 KB Output is correct
11 Correct 8 ms 13916 KB Output is correct
12 Correct 56 ms 27384 KB Output is correct
13 Correct 57 ms 27276 KB Output is correct
14 Correct 61 ms 27628 KB Output is correct
15 Correct 59 ms 27220 KB Output is correct
16 Correct 54 ms 27216 KB Output is correct
17 Correct 60 ms 27220 KB Output is correct
18 Correct 55 ms 27180 KB Output is correct
19 Correct 54 ms 27220 KB Output is correct
20 Correct 56 ms 27488 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 74 ms 20488 KB Output is correct
2 Correct 61 ms 27252 KB Output is correct
3 Correct 72 ms 24824 KB Output is correct
4 Correct 53 ms 20596 KB Output is correct
5 Correct 69 ms 24208 KB Output is correct
6 Correct 52 ms 20668 KB Output is correct
7 Correct 80 ms 24076 KB Output is correct
8 Correct 67 ms 20732 KB Output is correct
9 Correct 54 ms 27292 KB Output is correct
10 Correct 73 ms 23020 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12632 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12764 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 38 ms 16280 KB Output is correct
6 Correct 29 ms 22612 KB Output is correct
7 Correct 40 ms 20344 KB Output is correct
8 Correct 30 ms 16212 KB Output is correct
9 Correct 38 ms 19240 KB Output is correct
10 Correct 26 ms 16212 KB Output is correct
11 Correct 3 ms 12636 KB Output is correct
12 Correct 3 ms 12748 KB Output is correct
13 Correct 3 ms 12636 KB Output is correct
14 Correct 3 ms 12636 KB Output is correct
15 Correct 3 ms 12636 KB Output is correct
16 Correct 3 ms 12748 KB Output is correct
17 Correct 3 ms 12636 KB Output is correct
18 Correct 4 ms 12752 KB Output is correct
19 Correct 3 ms 12636 KB Output is correct
20 Correct 3 ms 12892 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 12632 KB Output is correct
2 Correct 2 ms 12636 KB Output is correct
3 Correct 2 ms 12764 KB Output is correct
4 Correct 2 ms 12636 KB Output is correct
5 Correct 38 ms 16280 KB Output is correct
6 Correct 29 ms 22612 KB Output is correct
7 Correct 40 ms 20344 KB Output is correct
8 Correct 30 ms 16212 KB Output is correct
9 Correct 38 ms 19240 KB Output is correct
10 Correct 26 ms 16212 KB Output is correct
11 Correct 2 ms 12636 KB Output is correct
12 Correct 2 ms 12736 KB Output is correct
13 Correct 2 ms 12636 KB Output is correct
14 Correct 55 ms 27368 KB Output is correct
15 Correct 55 ms 27356 KB Output is correct
16 Correct 52 ms 27220 KB Output is correct
17 Correct 53 ms 27216 KB Output is correct
18 Correct 57 ms 27392 KB Output is correct
19 Correct 52 ms 27320 KB Output is correct
20 Correct 59 ms 27176 KB Output is correct
21 Correct 8 ms 13916 KB Output is correct
22 Correct 56 ms 27384 KB Output is correct
23 Correct 57 ms 27276 KB Output is correct
24 Correct 61 ms 27628 KB Output is correct
25 Correct 59 ms 27220 KB Output is correct
26 Correct 54 ms 27216 KB Output is correct
27 Correct 60 ms 27220 KB Output is correct
28 Correct 55 ms 27180 KB Output is correct
29 Correct 54 ms 27220 KB Output is correct
30 Correct 56 ms 27488 KB Output is correct
31 Correct 74 ms 20488 KB Output is correct
32 Correct 61 ms 27252 KB Output is correct
33 Correct 72 ms 24824 KB Output is correct
34 Correct 53 ms 20596 KB Output is correct
35 Correct 69 ms 24208 KB Output is correct
36 Correct 52 ms 20668 KB Output is correct
37 Correct 80 ms 24076 KB Output is correct
38 Correct 67 ms 20732 KB Output is correct
39 Correct 54 ms 27292 KB Output is correct
40 Correct 73 ms 23020 KB Output is correct
41 Correct 3 ms 12636 KB Output is correct
42 Correct 3 ms 12748 KB Output is correct
43 Correct 3 ms 12636 KB Output is correct
44 Correct 3 ms 12636 KB Output is correct
45 Correct 3 ms 12636 KB Output is correct
46 Correct 3 ms 12748 KB Output is correct
47 Correct 3 ms 12636 KB Output is correct
48 Correct 4 ms 12752 KB Output is correct
49 Correct 3 ms 12636 KB Output is correct
50 Correct 3 ms 12892 KB Output is correct
51 Correct 77 ms 20736 KB Output is correct
52 Correct 59 ms 27272 KB Output is correct
53 Correct 71 ms 23160 KB Output is correct
54 Correct 53 ms 20296 KB Output is correct
55 Correct 74 ms 20484 KB Output is correct
56 Correct 56 ms 27332 KB Output is correct
57 Correct 83 ms 23752 KB Output is correct
58 Correct 64 ms 20236 KB Output is correct
59 Correct 76 ms 20488 KB Output is correct
60 Correct 56 ms 27220 KB Output is correct
61 Correct 74 ms 23956 KB Output is correct
62 Correct 62 ms 20092 KB Output is correct
63 Correct 80 ms 20392 KB Output is correct
64 Correct 55 ms 27220 KB Output is correct
65 Correct 77 ms 23812 KB Output is correct
66 Correct 53 ms 20332 KB Output is correct
67 Correct 78 ms 20260 KB Output is correct
68 Correct 54 ms 27256 KB Output is correct
69 Correct 87 ms 22912 KB Output is correct
70 Correct 56 ms 20236 KB Output is correct