oj.uz

Submission #582899

# Submission time Handle Problem Language Result Execution time Memory
582899 2022-06-24T14:42:30 Z Koosha_mv Simurgh (IOI17_simurgh) C++14
100 / 100
 243 ms 14144 KB 
#include "simurgh.h"
#include <bits/stdc++.h>
using namespace std;
#define dbgv(v) cout<<#v<<" = "; f(i,0,v.size()) cout<<v[i]<<" "; cout<<endl
#define dbga(a,x,y) cout<<#a<<" = "; f(i,x,y) cout<<a[i]<<" "; cout<<endl
#define erorp(x) cout<<#x<<"={"<<x.F<<" , "<<x.S<<"}"<<endl
#define eror(x) cout<<#x<<'='<<(x)<<endl
#define f_(i,a,b) for(int i=a;i>=b;i--)
#define f(i,a,b) for(int i=a;i<b;i++)
#define nb(x) __builtin_popcount(x)
#define all(v) v.begin(),v.end()
#define bit(n,k) (((n)>>(k))&1)
#define Add(x,y) x=(x+y)%mod
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define lst(x) x[x.size()-1]
#define sz(x) int(x.size())
#define mp make_pair
#define ll long long
#define pb push_back
#define S second
#define F first
 
const int N=505*505;
 
int n,m,askt,h[N],ok[N],vis[N],last[N],f[N],A[N],B[N],mark[N];
pair<int,int> par[N];
vector<int> tree;
vector<pair<int,int>> g[N];

int getpar(int u){
	if(f[u]<0) return u;
	return f[u]=getpar(f[u]);
}
void merge(int u,int v){
	u=getpar(u),v=getpar(v);
	if(f[u]>f[v]) swap(u,v);
	f[u]+=f[v];
	f[v]=u;
}
int ask(vector<int> vec){
	return count_common_roads(vec);
}
int get(vector<int> vec){
	fill(f,f+n,-1);
	int sum=0;
	for(auto id : vec){
		merge(A[id],B[id]);
	}
	for(auto id : tree){
		int u=getpar(A[id]),v=getpar(B[id]);
		if(u==v) continue ;
		merge(u,v);
		vec.pb(id);
		sum+=ok[id];
	}
	return ask(vec)-sum;
}
void dfs(int u){
	vis[u]=1;
	for(auto [v,id] : g[u]){
		if(vis[v]) continue ;
		tree.pb(id);
		h[v]=h[u]+1;
		par[v]={u,id};
		dfs(v);
	}
}
vector<int> G(vector<int> vec,int ad,int dl){
	vec.pb(ad);
	f(i,0,vec.size()){
		if(vec[i]==dl){
			vec.erase(vec.begin()+i);
		}
	}
	return vec;
}
vector<int> P(int u,int x){
	vector<int> res;
	f(i,0,x+1){
		res.pb(g[u][i].S);
	}
	return res;
}
vector<int> find_roads(int _n,vector<int> _B,vector<int> _A){
	fill(ok,ok+N,-1);
	// build graph
	vector<int> ans;
	n=_n,m=_A.size();
	f(i,0,m) A[i]=_A[i],B[i]=_B[i],g[A[i]].pb({B[i],i}),g[B[i]].pb({A[i],i});
	
	//find a tree
	dfs(0);
	askt=ask(tree);
	f(i,0,m){
		int u=A[i],v=B[i],mx=askt,cnt=0,edge=0;
		if(abs(h[u]-h[v])==1) continue ;
		if(h[u]>h[v]) swap(u,v);
		for(int x=v;x!=u;x=par[x].F){
			if(ok[par[x].S]!=-1){
				cnt++;
				edge=par[x].S;
			}
		}
		if(cnt==h[v]-h[u]) continue ;
		//cout<<u<<" -> "<<v<<endl;
		if(cnt>0){
			vector<int> prt=G(tree,i,edge);
			maxm(mx,ask(prt)+ok[edge]);
		}
		for(int x=v;x!=u;x=par[x].F){
			if(ok[par[x].S]!=-1) continue ;
			vector<int> prt=G(tree,i,par[x].S);
			last[par[x].S]=ask(prt);
			maxm(mx,last[par[x].S]);
		}
		for(int x=v;x!=u;x=par[x].F){
			if(ok[par[x].S]!=-1) continue ;
			if(last[par[x].S]==mx) ok[par[x].S]=0;
			else ok[par[x].S]=1;
		}
	}
	for(auto id : tree) if(ok[id]==-1) ok[id]=1;
	//dbga(ok,0,m);
	
	//main
	f(u,0,n){
		f_(i,g[u].size()-1,0) if(mark[g[u][i].S]) g[u].erase(g[u].begin()+i);
		vector<int> vec;
		int deg=get(P(u,g[u].size()-1));
		f(i,0,deg){
			int l=-1,r=g[u].size();
			while(l+1<r){
				int mid=(l+r)>>1;
				if(get(P(u,mid))<=i){
					l=mid;
				}
				else{
					r=mid;
				}
			}
			mark[g[u][r].S]=1;
			ans.pb(g[u][r].S);
		}
	}
	sort(all(ans));
	ans.resize(unique(all(ans))-ans.begin());
	return ans;
}

Compilation message

simurgh.cpp: In function 'void dfs(int)':
simurgh.cpp:61:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |  for(auto [v,id] : g[u]){
      |           ^
simurgh.cpp: In function 'std::vector<int> G(std::vector<int>, int, int)':
simurgh.cpp:9:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 | #define f(i,a,b) for(int i=a;i<b;i++)
......
   71 |  f(i,0,vec.size()){
      |    ~~~~~~~~~~~~~~              
simurgh.cpp:71:2: note: in expansion of macro 'f'
   71 |  f(i,0,vec.size()){
      |  ^

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB correct
2 Correct 4 ms 7252 KB correct
3 Correct 4 ms 7252 KB correct
4 Correct 4 ms 7260 KB correct
5 Correct 4 ms 7220 KB correct
6 Correct 4 ms 7252 KB correct
7 Correct 4 ms 7252 KB correct
8 Correct 4 ms 7252 KB correct
9 Correct 4 ms 7252 KB correct
10 Correct 4 ms 7252 KB correct
11 Correct 4 ms 7252 KB correct
12 Correct 4 ms 7252 KB correct
13 Correct 4 ms 7252 KB correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB correct
2 Correct 4 ms 7252 KB correct
3 Correct 4 ms 7252 KB correct
4 Correct 4 ms 7260 KB correct
5 Correct 4 ms 7220 KB correct
6 Correct 4 ms 7252 KB correct
7 Correct 4 ms 7252 KB correct
8 Correct 4 ms 7252 KB correct
9 Correct 4 ms 7252 KB correct
10 Correct 4 ms 7252 KB correct
11 Correct 4 ms 7252 KB correct
12 Correct 4 ms 7252 KB correct
13 Correct 4 ms 7252 KB correct
14 Correct 5 ms 7380 KB correct
15 Correct 5 ms 7380 KB correct
16 Correct 5 ms 7324 KB correct
17 Correct 5 ms 7380 KB correct
18 Correct 4 ms 7380 KB correct
19 Correct 5 ms 7380 KB correct
20 Correct 5 ms 7380 KB correct
21 Correct 5 ms 7380 KB correct
22 Correct 5 ms 7380 KB correct
23 Correct 5 ms 7252 KB correct
24 Correct 5 ms 7252 KB correct
25 Correct 4 ms 7252 KB correct
26 Correct 5 ms 7292 KB correct
27 Correct 5 ms 7372 KB correct
28 Correct 4 ms 7252 KB correct
29 Correct 4 ms 7252 KB correct
30 Correct 5 ms 7380 KB correct
31 Correct 5 ms 7252 KB correct
32 Correct 5 ms 7380 KB correct
33 Correct 5 ms 7280 KB correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB correct
2 Correct 4 ms 7252 KB correct
3 Correct 4 ms 7252 KB correct
4 Correct 4 ms 7260 KB correct
5 Correct 4 ms 7220 KB correct
6 Correct 4 ms 7252 KB correct
7 Correct 4 ms 7252 KB correct
8 Correct 4 ms 7252 KB correct
9 Correct 4 ms 7252 KB correct
10 Correct 4 ms 7252 KB correct
11 Correct 4 ms 7252 KB correct
12 Correct 4 ms 7252 KB correct
13 Correct 4 ms 7252 KB correct
14 Correct 5 ms 7380 KB correct
15 Correct 5 ms 7380 KB correct
16 Correct 5 ms 7324 KB correct
17 Correct 5 ms 7380 KB correct
18 Correct 4 ms 7380 KB correct
19 Correct 5 ms 7380 KB correct
20 Correct 5 ms 7380 KB correct
21 Correct 5 ms 7380 KB correct
22 Correct 5 ms 7380 KB correct
23 Correct 5 ms 7252 KB correct
24 Correct 5 ms 7252 KB correct
25 Correct 4 ms 7252 KB correct
26 Correct 5 ms 7292 KB correct
27 Correct 5 ms 7372 KB correct
28 Correct 4 ms 7252 KB correct
29 Correct 4 ms 7252 KB correct
30 Correct 5 ms 7380 KB correct
31 Correct 5 ms 7252 KB correct
32 Correct 5 ms 7380 KB correct
33 Correct 5 ms 7280 KB correct
34 Correct 44 ms 8660 KB correct
35 Correct 44 ms 8660 KB correct
36 Correct 37 ms 8416 KB correct
37 Correct 15 ms 7380 KB correct
38 Correct 46 ms 8692 KB correct
39 Correct 43 ms 8640 KB correct
40 Correct 38 ms 8488 KB correct
41 Correct 41 ms 8740 KB correct
42 Correct 43 ms 8780 KB correct
43 Correct 29 ms 8220 KB correct
44 Correct 25 ms 7964 KB correct
45 Correct 30 ms 8020 KB correct
46 Correct 26 ms 7892 KB correct
47 Correct 20 ms 7612 KB correct
48 Correct 11 ms 7380 KB correct
49 Correct 14 ms 7456 KB correct
50 Correct 22 ms 7636 KB correct
51 Correct 27 ms 8024 KB correct
52 Correct 28 ms 7924 KB correct
53 Correct 29 ms 7892 KB correct
54 Correct 28 ms 8232 KB correct
55 Correct 29 ms 8020 KB correct
56 Correct 28 ms 8020 KB correct
57 Correct 28 ms 7940 KB correct

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB correct
2 Correct 4 ms 7252 KB correct
3 Correct 137 ms 11396 KB correct
4 Correct 223 ms 13152 KB correct
5 Correct 231 ms 13140 KB correct
6 Correct 214 ms 13148 KB correct
7 Correct 213 ms 13116 KB correct
8 Correct 209 ms 13304 KB correct
9 Correct 221 ms 13232 KB correct
10 Correct 223 ms 13132 KB correct
11 Correct 232 ms 13032 KB correct
12 Correct 243 ms 13184 KB correct
13 Correct 4 ms 7252 KB correct
14 Correct 228 ms 13148 KB correct
15 Correct 227 ms 13068 KB correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 7252 KB correct
2 Correct 4 ms 7252 KB correct
3 Correct 4 ms 7252 KB correct
4 Correct 4 ms 7260 KB correct
5 Correct 4 ms 7220 KB correct
6 Correct 4 ms 7252 KB correct
7 Correct 4 ms 7252 KB correct
8 Correct 4 ms 7252 KB correct
9 Correct 4 ms 7252 KB correct
10 Correct 4 ms 7252 KB correct
11 Correct 4 ms 7252 KB correct
12 Correct 4 ms 7252 KB correct
13 Correct 4 ms 7252 KB correct
14 Correct 5 ms 7380 KB correct
15 Correct 5 ms 7380 KB correct
16 Correct 5 ms 7324 KB correct
17 Correct 5 ms 7380 KB correct
18 Correct 4 ms 7380 KB correct
19 Correct 5 ms 7380 KB correct
20 Correct 5 ms 7380 KB correct
21 Correct 5 ms 7380 KB correct
22 Correct 5 ms 7380 KB correct
23 Correct 5 ms 7252 KB correct
24 Correct 5 ms 7252 KB correct
25 Correct 4 ms 7252 KB correct
26 Correct 5 ms 7292 KB correct
27 Correct 5 ms 7372 KB correct
28 Correct 4 ms 7252 KB correct
29 Correct 4 ms 7252 KB correct
30 Correct 5 ms 7380 KB correct
31 Correct 5 ms 7252 KB correct
32 Correct 5 ms 7380 KB correct
33 Correct 5 ms 7280 KB correct
34 Correct 44 ms 8660 KB correct
35 Correct 44 ms 8660 KB correct
36 Correct 37 ms 8416 KB correct
37 Correct 15 ms 7380 KB correct
38 Correct 46 ms 8692 KB correct
39 Correct 43 ms 8640 KB correct
40 Correct 38 ms 8488 KB correct
41 Correct 41 ms 8740 KB correct
42 Correct 43 ms 8780 KB correct
43 Correct 29 ms 8220 KB correct
44 Correct 25 ms 7964 KB correct
45 Correct 30 ms 8020 KB correct
46 Correct 26 ms 7892 KB correct
47 Correct 20 ms 7612 KB correct
48 Correct 11 ms 7380 KB correct
49 Correct 14 ms 7456 KB correct
50 Correct 22 ms 7636 KB correct
51 Correct 27 ms 8024 KB correct
52 Correct 28 ms 7924 KB correct
53 Correct 29 ms 7892 KB correct
54 Correct 28 ms 8232 KB correct
55 Correct 29 ms 8020 KB correct
56 Correct 28 ms 8020 KB correct
57 Correct 28 ms 7940 KB correct
58 Correct 4 ms 7252 KB correct
59 Correct 4 ms 7252 KB correct
60 Correct 137 ms 11396 KB correct
61 Correct 223 ms 13152 KB correct
62 Correct 231 ms 13140 KB correct
63 Correct 214 ms 13148 KB correct
64 Correct 213 ms 13116 KB correct
65 Correct 209 ms 13304 KB correct
66 Correct 221 ms 13232 KB correct
67 Correct 223 ms 13132 KB correct
68 Correct 232 ms 13032 KB correct
69 Correct 243 ms 13184 KB correct
70 Correct 4 ms 7252 KB correct
71 Correct 228 ms 13148 KB correct
72 Correct 227 ms 13068 KB correct
73 Correct 5 ms 7252 KB correct
74 Correct 229 ms 13068 KB correct
75 Correct 226 ms 13900 KB correct
76 Correct 107 ms 9988 KB correct
77 Correct 235 ms 13972 KB correct
78 Correct 224 ms 14108 KB correct
79 Correct 223 ms 14144 KB correct
80 Correct 217 ms 13868 KB correct
81 Correct 195 ms 13288 KB correct
82 Correct 218 ms 13884 KB correct
83 Correct 158 ms 11072 KB correct
84 Correct 136 ms 11552 KB correct
85 Correct 133 ms 11316 KB correct
86 Correct 105 ms 9892 KB correct
87 Correct 95 ms 9452 KB correct
88 Correct 83 ms 8788 KB correct
89 Correct 84 ms 8744 KB correct
90 Correct 80 ms 8584 KB correct
91 Correct 44 ms 7480 KB correct
92 Correct 33 ms 7432 KB correct
93 Correct 129 ms 11212 KB correct
94 Correct 113 ms 9880 KB correct
95 Correct 103 ms 9876 KB correct
96 Correct 82 ms 8684 KB correct
97 Correct 85 ms 8716 KB correct
98 Correct 95 ms 9428 KB correct
99 Correct 85 ms 8808 KB correct
100 Correct 58 ms 7744 KB correct
101 Correct 34 ms 7380 KB correct
102 Correct 134 ms 10532 KB correct
103 Correct 138 ms 10536 KB correct
104 Correct 140 ms 10640 KB correct
105 Correct 135 ms 10516 KB correct