oj.uz

답안 #960731

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
960731 2024-04-11T01:58:46 Z pcc Election Campaign (JOI15_election_campaign) C++17
100 / 100
 119 ms 31724 KB 
#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,popcnt,sse4")
 
const int mxn = 1e5+10;
int N,Q,rt;
 
vector<int> tree[mxn];
vector<pair<pii,int>> req[mxn];
 
inline char readchar() {
	const int S = 1<<20; // buffer size
	static char buf[S], *p = buf, *q = buf;
	if(p == q && (q = (p=buf)+fread(buf,1,S,stdin)) == buf) return EOF;
	return *p++;
}
 
inline int nextint() {
	int x = 0, c = readchar(), neg = false;
	while(('0' > c || c > '9') && c!='-' && c!=EOF) c = readchar();
	if(c == '-') neg = true, c = getchar();
	while('0' <= c && c <= '9') x = x*10 + (c^'0'), c = readchar();
	if(neg) x = -x;
	return x; // returns 0 if EOF
}
 
namespace HLD{
	int idx[mxn],link_top[mxn],par[mxn],dep[mxn],bs[mxn],sz[mxn];
	ll bit[mxn];
	void modify(int p,ll v){
		for(;p<mxn;p+=p&-p)bit[p] += v;
		return;
	}
	ll getval(int s,int e){
		int re = 0;
		for(;e>0;e-= e&-e)re += bit[e];
		s--;
		for(;s>0;s-= s&-s)re -= bit[s];
		return re;
	}
	int cnt = 0;
	void dfs1(int now){
		sz[now] = 1;
		for(auto nxt:tree[now]){
			if(nxt == par[now])continue;
			par[nxt] = now;
			dep[nxt] = dep[now]+1;
			dfs1(nxt);
          	sz[now] += sz[nxt];
			if(!bs[now]||sz[bs[now]]<sz[nxt])bs[now] = nxt;
		}
		return;
	}
	void dfs2(int now,int top){
		idx[now] = ++cnt;
		link_top[now] = top;
		if(bs[now])dfs2(bs[now],top);
		for(auto nxt:tree[now]){
			if(nxt == par[now]||nxt == bs[now])continue;
			dfs2(nxt,nxt);
		}
		return;
	}
	pll LCA(int a,int b){
		pll re = pll(0,0);
		int ta = link_top[a],tb = link_top[b];
		while(ta != tb){
			if(dep[ta]<dep[tb]){
				swap(a,b);
				swap(ta,tb);
			}
			re.sc += getval(idx[ta],idx[a]);
			a = par[ta];ta = link_top[a];
		}
		if(idx[a]>idx[b])swap(a,b);
		re.sc += getval(idx[a],idx[b]);
		re.fs = a;
		return re;
	}
}
 
namespace CALC{
	ll ans = 0;
	ll sum[mxn],dp[mxn];
	void dfs(int now){
		for(auto nxt:tree[now]){
			if(nxt == HLD::par[now])continue;
			dfs(nxt);
			sum[now] += dp[nxt];
		}
		dp[now] = max(dp[now],sum[now]);
		for(auto &i:req[now]){
			auto [a,b] = i.fs;
			int w = i.sc;
			ll ts = sum[now]+HLD::LCA(a,b).sc+w;
			dp[now] = max(dp[now],ts);
		}
		HLD::modify(HLD::idx[now],sum[now]-dp[now]);
	}
	void GO(){
		dfs(rt);
		printf("%d\n",dp[rt]);
		return;
	}
}
 
int main(){
	N = nextint();
	for(int i = 1;i<N;i++){
		int a,b;
		a = nextint(),b = nextint();
		tree[a].push_back(b);
		tree[b].push_back(a);
	}
  rt = (N+1)>>1;
	HLD::dfs1(rt);
	HLD::dfs2(rt,rt);
	Q = nextint();
	while(Q--){
		int a,b,c;
		a = nextint();b = nextint();c = nextint();
		int h = HLD::LCA(a,b).fs;
		req[h].push_back(make_pair(pii(a,b),c));
	}
	CALC::GO();
}

Compilation message

election_campaign.cpp: In function 'void CALC::GO()':
election_campaign.cpp:110:12: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  110 |   printf("%d\n",dp[rt]);
      |           ~^    ~~~~~~
      |            |         |
      |            int       long long int
      |           %lld

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 27 ms 14000 KB Output is correct
6 Correct 31 ms 26452 KB Output is correct
7 Correct 46 ms 26320 KB Output is correct
8 Correct 17 ms 13656 KB Output is correct
9 Correct 37 ms 26716 KB Output is correct
10 Correct 22 ms 13660 KB Output is correct

Subtask #2
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 7512 KB Output is correct
2 Correct 3 ms 7516 KB Output is correct
3 Correct 2 ms 7772 KB Output is correct
4 Correct 53 ms 28308 KB Output is correct
5 Correct 44 ms 28496 KB Output is correct
6 Correct 40 ms 28500 KB Output is correct
7 Correct 41 ms 28516 KB Output is correct
8 Correct 43 ms 28500 KB Output is correct
9 Correct 42 ms 28500 KB Output is correct
10 Correct 48 ms 28400 KB Output is correct

Subtask #3
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 7512 KB Output is correct
2 Correct 3 ms 7516 KB Output is correct
3 Correct 2 ms 7772 KB Output is correct
4 Correct 53 ms 28308 KB Output is correct
5 Correct 44 ms 28496 KB Output is correct
6 Correct 40 ms 28500 KB Output is correct
7 Correct 41 ms 28516 KB Output is correct
8 Correct 43 ms 28500 KB Output is correct
9 Correct 42 ms 28500 KB Output is correct
10 Correct 48 ms 28400 KB Output is correct
11 Correct 4 ms 8536 KB Output is correct
12 Correct 41 ms 28480 KB Output is correct
13 Correct 50 ms 28496 KB Output is correct
14 Correct 40 ms 28496 KB Output is correct
15 Correct 41 ms 28500 KB Output is correct
16 Correct 47 ms 28500 KB Output is correct
17 Correct 45 ms 28496 KB Output is correct
18 Correct 44 ms 28308 KB Output is correct
19 Correct 43 ms 28496 KB Output is correct
20 Correct 46 ms 28500 KB Output is correct

Subtask #4
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 110 ms 15532 KB Output is correct
2 Correct 41 ms 28508 KB Output is correct
3 Correct 79 ms 24944 KB Output is correct
4 Correct 49 ms 15132 KB Output is correct
5 Correct 70 ms 31724 KB Output is correct
6 Correct 54 ms 15172 KB Output is correct
7 Correct 65 ms 31312 KB Output is correct
8 Correct 75 ms 15712 KB Output is correct
9 Correct 50 ms 28496 KB Output is correct
10 Correct 69 ms 31056 KB Output is correct

Subtask #5
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 27 ms 14000 KB Output is correct
6 Correct 31 ms 26452 KB Output is correct
7 Correct 46 ms 26320 KB Output is correct
8 Correct 17 ms 13656 KB Output is correct
9 Correct 37 ms 26716 KB Output is correct
10 Correct 22 ms 13660 KB Output is correct
11 Correct 3 ms 7512 KB Output is correct
12 Correct 2 ms 7772 KB Output is correct
13 Correct 2 ms 7772 KB Output is correct
14 Correct 2 ms 7516 KB Output is correct
15 Correct 2 ms 7516 KB Output is correct
16 Correct 2 ms 7772 KB Output is correct
17 Correct 2 ms 7516 KB Output is correct
18 Correct 3 ms 7856 KB Output is correct
19 Correct 3 ms 7604 KB Output is correct
20 Correct 2 ms 7768 KB Output is correct

Subtask #6
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 7516 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 2 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 27 ms 14000 KB Output is correct
6 Correct 31 ms 26452 KB Output is correct
7 Correct 46 ms 26320 KB Output is correct
8 Correct 17 ms 13656 KB Output is correct
9 Correct 37 ms 26716 KB Output is correct
10 Correct 22 ms 13660 KB Output is correct
11 Correct 2 ms 7512 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 2 ms 7772 KB Output is correct
14 Correct 53 ms 28308 KB Output is correct
15 Correct 44 ms 28496 KB Output is correct
16 Correct 40 ms 28500 KB Output is correct
17 Correct 41 ms 28516 KB Output is correct
18 Correct 43 ms 28500 KB Output is correct
19 Correct 42 ms 28500 KB Output is correct
20 Correct 48 ms 28400 KB Output is correct
21 Correct 4 ms 8536 KB Output is correct
22 Correct 41 ms 28480 KB Output is correct
23 Correct 50 ms 28496 KB Output is correct
24 Correct 40 ms 28496 KB Output is correct
25 Correct 41 ms 28500 KB Output is correct
26 Correct 47 ms 28500 KB Output is correct
27 Correct 45 ms 28496 KB Output is correct
28 Correct 44 ms 28308 KB Output is correct
29 Correct 43 ms 28496 KB Output is correct
30 Correct 46 ms 28500 KB Output is correct
31 Correct 110 ms 15532 KB Output is correct
32 Correct 41 ms 28508 KB Output is correct
33 Correct 79 ms 24944 KB Output is correct
34 Correct 49 ms 15132 KB Output is correct
35 Correct 70 ms 31724 KB Output is correct
36 Correct 54 ms 15172 KB Output is correct
37 Correct 65 ms 31312 KB Output is correct
38 Correct 75 ms 15712 KB Output is correct
39 Correct 50 ms 28496 KB Output is correct
40 Correct 69 ms 31056 KB Output is correct
41 Correct 3 ms 7512 KB Output is correct
42 Correct 2 ms 7772 KB Output is correct
43 Correct 2 ms 7772 KB Output is correct
44 Correct 2 ms 7516 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 2 ms 7772 KB Output is correct
47 Correct 2 ms 7516 KB Output is correct
48 Correct 3 ms 7856 KB Output is correct
49 Correct 3 ms 7604 KB Output is correct
50 Correct 2 ms 7768 KB Output is correct
51 Correct 81 ms 15836 KB Output is correct
52 Correct 43 ms 28288 KB Output is correct
53 Correct 72 ms 26740 KB Output is correct
54 Correct 39 ms 15060 KB Output is correct
55 Correct 101 ms 15736 KB Output is correct
56 Correct 51 ms 28496 KB Output is correct
57 Correct 70 ms 25664 KB Output is correct
58 Correct 57 ms 15112 KB Output is correct
59 Correct 82 ms 15792 KB Output is correct
60 Correct 44 ms 28344 KB Output is correct
61 Correct 74 ms 29268 KB Output is correct
62 Correct 47 ms 15368 KB Output is correct
63 Correct 103 ms 15628 KB Output is correct
64 Correct 47 ms 28504 KB Output is correct
65 Correct 71 ms 24356 KB Output is correct
66 Correct 41 ms 15208 KB Output is correct
67 Correct 119 ms 15424 KB Output is correct
68 Correct 48 ms 28544 KB Output is correct
69 Correct 78 ms 28752 KB Output is correct
70 Correct 46 ms 15120 KB Output is correct