oj.uz

답안 #947443

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
947443 2024-03-16T07:33:48 Z Mestu 경주 (Race) (IOI11_race) C++14
100 / 100
 689 ms 40240 KB 
#include <bits/stdc++.h>
using namespace std;
//#include<ext/pb_ds/assoc_container.hpp>
//#include<ext/pb_ds/tree_policy.hpp>
//using namespace __gnu_pbds;
//typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> pbds; // find_by_order, order_of_key
#define ll long long
#define vi vector<int>
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vvi vector<vi>
#define vll vector<ll>
#define vvll vector<vector<ll>>
#define vpii vector<pair<int,int>>
#define vpll vector<pair<ll,ll>>
int Set(int N, int pos) {return  N = N | (1<<pos);}
int Reset(int N, int pos) {return  N = N & ~(1<<pos);}
bool Cheek(int N, int pos) {return  (bool)(N & (1<<pos));}
#define least_one_pos(x) __builtin_ffs(x)
#define leading_zeros(x) __builtin_clz(x)
#define tailing_zeros(x) __builtin_ctz(x)
#define num_of_one(x) __builtin_popcount(x)
///............x...........///
#define all(a) a.begin(), a.end()
#define allr(a) a.rbegin(), a.rend()
#define mp(a, b) make_pair(a, b)
#define pb push_back
#define UNIQUE(X) (X).erase(unique(all(X)), (X).end())
#define ft cout << "for test"<<endl;
#define print(v) for (auto it : v)cout << it<<" ";cout << endl;
#define cinv(v) for(auto &it : v)cin>>it;
#define PI acos(-1.0)
#define FIO ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define t_c int test, cs = 1;cin>>test;while (test--)
///................function.....................///

//#define mod 1000000007
//........constant........///
const ll N = 1e6+5;
void file(){
   freopen("input.txt","r",stdin);
   freopen("output.txt","w",stdout);
}
class CentroidDecomposition{
public:
	vector<vector<pii>>adj;
	vector<bool>removed;
	vector<int>subtree,parent;
	map<int,int>Count;
	int n,root,k;
	ll ans;
	CentroidDecomposition(int _n, int _k){
		n = _n;
		k = _k;
		root=1;
		adj.resize(n+1);
		removed.resize(n+1);
		subtree.resize(n+1);
		parent.resize(n+1);
		ans=INT_MAX;
	}
	void readTree(int H[][2], int L[]){
		for(int i=0; i<n-1; i++){
			int a=H[i][0],b=H[i][1];
			adj[a].push_back({b,L[i]});
			adj[b].push_back({a,L[i]});
		}
		centroid_decomposition(0);
		// cout<<ans<<endl;
	}
	int get_subtree_size(int node, int par=-1){
		subtree[node]=1;
		for(auto x:adj[node])
			if(!removed[x.first] and par!=x.first)
				subtree[node] += get_subtree_size(x.first,node);
		return subtree[node];
	}
 
	int get_centroid(int node, int desired, int par=-1){
		for(auto x:adj[node])
			if(!removed[x.first] and x.first!=par and desired<=subtree[x.first])
				return get_centroid(x.first,desired,node);
		return node;
	}
	void get_cnt(int nd, int par, int d, int l, bool tp){
		if(d>k)return;
		// cout<<nd<<" "<<par<<" "<<d<<" "<<l<<" "<<tp<<endl;
		if(!tp){
			if(Count.find(d)!=Count.end())
				Count[d] = min(Count[d],l);
			else
				Count[d]=l;
			// cout<<"add "<<d<<" "<<Count[d]<<endl;
		}
		else{
			if(Count.find(k-d)!=Count.end()){
				ans = min(ans,(ll)l+Count[k-d]);
				// cout<<k-d<<" update "<<l<<" + "<<Count[k-d]<<endl;
			}
		}
		for(auto x:adj[nd])
			if(!removed[x.first] and x.first!=par)
				get_cnt(x.first,nd,d+x.second,l+1,tp);
	}
	void centroid_decomposition(int node){
		int centroid = get_centroid(node,get_subtree_size(node)>>1);
		removed[centroid]=true;
		// cout<<"centroid "<<centroid<<endl;
		Count.clear();
		Count[0]=0;
		for(auto x:adj[centroid]){
			if(!removed[x.first]){
				get_cnt(x.first,centroid,x.second,1,1);
				get_cnt(x.first,centroid,x.second,1,0);
			}
		}
		for(auto x:adj[centroid]){
			if(!removed[x.first])
				centroid_decomposition(x.first);
		}
	}
};
int best_path(int N, int K, int H[][2], int L[]){
	CentroidDecomposition cd(N,K);
	cd.readTree(H,L);
	cd.centroid_decomposition(1);
	if(cd.ans==INT_MAX)cd.ans=-1;
	return cd.ans;
}

Compilation message

race.cpp: In function 'void file()':
race.cpp:41:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |    freopen("input.txt","r",stdin);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
race.cpp:42:11: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   42 |    freopen("output.txt","w",stdout);
      |    ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 2 ms 2648 KB Output is correct
22 Correct 1 ms 2568 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2500 KB Output is correct
25 Correct 2 ms 2396 KB Output is correct
26 Correct 2 ms 2396 KB Output is correct
27 Correct 2 ms 2396 KB Output is correct
28 Correct 2 ms 2396 KB Output is correct
29 Correct 2 ms 2464 KB Output is correct
30 Correct 2 ms 2396 KB Output is correct
31 Correct 2 ms 2396 KB Output is correct
32 Correct 2 ms 2396 KB Output is correct
33 Correct 2 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 2 ms 2396 KB Output is correct
38 Correct 2 ms 2396 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 147 ms 11600 KB Output is correct
20 Correct 143 ms 12568 KB Output is correct
21 Correct 159 ms 12260 KB Output is correct
22 Correct 156 ms 12960 KB Output is correct
23 Correct 57 ms 13136 KB Output is correct
24 Correct 63 ms 12960 KB Output is correct
25 Correct 97 ms 14284 KB Output is correct
26 Correct 90 ms 18000 KB Output is correct
27 Correct 135 ms 20052 KB Output is correct
28 Correct 162 ms 26920 KB Output is correct
29 Correct 170 ms 26660 KB Output is correct
30 Correct 145 ms 20564 KB Output is correct
31 Correct 139 ms 20560 KB Output is correct
32 Correct 142 ms 20556 KB Output is correct
33 Correct 204 ms 19552 KB Output is correct
34 Correct 117 ms 19764 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2396 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 0 ms 2396 KB Output is correct
5 Correct 1 ms 2396 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 0 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 1 ms 2648 KB Output is correct
12 Correct 1 ms 2396 KB Output is correct
13 Correct 1 ms 2392 KB Output is correct
14 Correct 1 ms 2396 KB Output is correct
15 Correct 1 ms 2396 KB Output is correct
16 Correct 1 ms 2396 KB Output is correct
17 Correct 1 ms 2396 KB Output is correct
18 Correct 1 ms 2396 KB Output is correct
19 Correct 1 ms 2392 KB Output is correct
20 Correct 1 ms 2396 KB Output is correct
21 Correct 2 ms 2648 KB Output is correct
22 Correct 1 ms 2568 KB Output is correct
23 Correct 1 ms 2396 KB Output is correct
24 Correct 1 ms 2500 KB Output is correct
25 Correct 2 ms 2396 KB Output is correct
26 Correct 2 ms 2396 KB Output is correct
27 Correct 2 ms 2396 KB Output is correct
28 Correct 2 ms 2396 KB Output is correct
29 Correct 2 ms 2464 KB Output is correct
30 Correct 2 ms 2396 KB Output is correct
31 Correct 2 ms 2396 KB Output is correct
32 Correct 2 ms 2396 KB Output is correct
33 Correct 2 ms 2396 KB Output is correct
34 Correct 1 ms 2396 KB Output is correct
35 Correct 1 ms 2396 KB Output is correct
36 Correct 1 ms 2396 KB Output is correct
37 Correct 2 ms 2396 KB Output is correct
38 Correct 2 ms 2396 KB Output is correct
39 Correct 147 ms 11600 KB Output is correct
40 Correct 143 ms 12568 KB Output is correct
41 Correct 159 ms 12260 KB Output is correct
42 Correct 156 ms 12960 KB Output is correct
43 Correct 57 ms 13136 KB Output is correct
44 Correct 63 ms 12960 KB Output is correct
45 Correct 97 ms 14284 KB Output is correct
46 Correct 90 ms 18000 KB Output is correct
47 Correct 135 ms 20052 KB Output is correct
48 Correct 162 ms 26920 KB Output is correct
49 Correct 170 ms 26660 KB Output is correct
50 Correct 145 ms 20564 KB Output is correct
51 Correct 139 ms 20560 KB Output is correct
52 Correct 142 ms 20556 KB Output is correct
53 Correct 204 ms 19552 KB Output is correct
54 Correct 117 ms 19764 KB Output is correct
55 Correct 15 ms 3420 KB Output is correct
56 Correct 11 ms 3164 KB Output is correct
57 Correct 100 ms 11956 KB Output is correct
58 Correct 40 ms 12744 KB Output is correct
59 Correct 236 ms 21580 KB Output is correct
60 Correct 689 ms 40240 KB Output is correct
61 Correct 199 ms 20056 KB Output is correct
62 Correct 230 ms 20564 KB Output is correct
63 Correct 245 ms 20628 KB Output is correct
64 Correct 672 ms 23852 KB Output is correct
65 Correct 115 ms 21476 KB Output is correct
66 Correct 474 ms 23620 KB Output is correct
67 Correct 92 ms 22464 KB Output is correct
68 Correct 284 ms 24544 KB Output is correct
69 Correct 298 ms 22352 KB Output is correct
70 Correct 287 ms 24144 KB Output is correct