oj.uz

Submission #852293

# Submission time Handle Problem Language Result Execution time Memory
852293 2023-09-21T14:38:41 Z Wansur Longest Trip (IOI23_longesttrip) C++17
85 / 100
 12 ms 1948 KB 
#include <vector>
#include<bits/stdc++.h>
#define f first
#define s second
#define ent '\n'
 
using namespace std;
typedef long long ll;
 
const int mx=5e2+12;
 
vector<int> g[mx];
int was[mx][mx];
 
bool are_connected(std::vector<int> A, std::vector<int> B);
 
int  ask(int a,int b){
	if(!was[a][b]){
		was[a][b]=was[b][a]=(int)are_connected({a},{b})+1;
	}
	return was[a][b]-1;
}
 
std::vector<int> longest_trip(int n, int d){
	vector<int> ans;
	if(d==3){
		for(int i=0;i<n;i++){
			ans.push_back(i);
		}
		return ans;
	}
	bool used[n+12]={};
	if(d==2){
		deque<int> ans;
		ans.push_back(0);
		for(int i=1;i<n;i++){
			if(are_connected({0},{i})){
				ans.push_back(i);
				used[0]=1;
				used[i]=1;
				break;
			}
		}
		for(int i=1;i<n;i++){
			if(used[i]){
				continue;
			}
			if(are_connected({ans.back()},{i})){
				ans.push_back(i);
			}
			else{
				ans.push_front(i);
			}
		}
		vector<int> v;
		for(int x:ans){
			v.push_back(x);
		}
		return v;
	}
	for(int i=0;i<n;i++){
		g[i].clear();
		for(int j=0;j<n;j++){
			was[i][j]=0;
		}
	}
	srand(time(0));
	vector<int> t;
	for(int i=0;i<n;i++){
		g[i].push_back(i);
		t.push_back(i);
	}
	while(t.size()>2){
		int a=t[0],b=t[1],c=t[2];
		vector<pair<int,int>> d;
		d.push_back({a,b});
		d.push_back({a,c});
		d.push_back({b,c});
		random_shuffle(d.begin(),d.end());
		int v,u;
		if(ask(d[0].f,d[0].s)){
			v=d[0].f,u=d[0].s;
		}
		else if(ask(d[1].f,d[1].s)){
			v=d[1].f,u=d[1].s;
		}
		else{
			v=d[2].f,u=d[2].s;
		}
		reverse(g[v].begin(),g[v].end());
		for(int x:g[u]){
			g[v].push_back(x);
		}
		g[u].clear();
		int x=g[v][0];
		if(x!=v){
			for(int to:g[v]){
				g[x].push_back(to);
			}
			g[v].clear();
		}
		t.clear();
		for(int i=0;i<n;i++){
			if((int)g[i].size()>0){
				t.push_back(i);
			}
		}
	}
	int a=t[0],b=t[1];
	if(are_connected(g[a],g[b])){
		vector<int> ans;
		vector<int> v=g[a],u=g[b];
		if(ask(v[0],u.back())){
			ans=u;
			for(int x:v){
				ans.push_back(x);
			}
			return ans;
		}
		if(ask(v[0],u[0])){
			reverse(u.begin(),u.end());
			ans=u;
			for(int x:v){
				ans.push_back(x);
			}
			return ans;
		}
		if(ask(v.back(),u[0])){
			ans=v;
			for(int x:u){
				ans.push_back(x);
			}
			return ans;
		}
		if(ask(v.back(),u.back())){
			ans=v;
			reverse(u.begin(),u.end());
			for(int x:u){
				ans.push_back(x);
			}
			return ans;
		}
		int pos=-1,pos1=-1;
		for(int l=1,r=v.size();l<=r;){
			int mid=l+r>>1;
			vector<int> t;
			for(int i=0;i<mid;i++){
				t.push_back(v[i]);
			}
			if(are_connected(t,u)){
				pos=mid-1;
				r=mid-1;
			}
			else{
				l=mid+1;
			}
		}
		for(int l=1,r=u.size();l<=r;){
			int mid=l+r>>1;
			vector<int> t;
			for(int i=0;i<mid;i++){
				t.push_back(u[i]);
			}
			if(are_connected({v[pos]},t)){
				pos1=mid-1;
				r=mid-1;
			}
			else{
				l=mid+1;
			}
		}
		vector<int> x,y;
		for(int i=pos;i<v.size();i++){
			x.push_back(v[i]);
		}
		for(int i=0;i<pos;i++){
			x.push_back(v[i]);
		}
		for(int i=pos1;i<u.size();i++){
			y.push_back(u[i]);
		}
		for(int i=0;i<pos1;i++){
			y.push_back(u[i]);
		}
		reverse(x.begin(),x.end());
		for(int t:x){
			ans.push_back(t);
		}
		for(int t:y){
			ans.push_back(t);
		}
		return ans;
	}
	else{
		if((int)g[a].size()>(int)g[b].size()){
			return g[a];
		}
		else{
			return g[b];
		}
	}
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:145:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  145 |    int mid=l+r>>1;
      |            ~^~
longesttrip.cpp:159:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  159 |    int mid=l+r>>1;
      |            ~^~
longesttrip.cpp:173:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  173 |   for(int i=pos;i<v.size();i++){
      |                 ~^~~~~~~~~
longesttrip.cpp:179:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  179 |   for(int i=pos1;i<u.size();i++){
      |                  ~^~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 2 ms 1112 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 1 ms 344 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 5 ms 344 KB Output is correct
3 Correct 4 ms 344 KB Output is correct
4 Correct 4 ms 600 KB Output is correct
5 Correct 4 ms 344 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 4 ms 344 KB Output is correct
8 Correct 6 ms 344 KB Output is correct
9 Correct 5 ms 596 KB Output is correct
10 Correct 4 ms 344 KB Output is correct
11 Correct 5 ms 456 KB Output is correct
12 Correct 4 ms 600 KB Output is correct
13 Correct 5 ms 344 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 6 ms 600 KB Output is correct
5 Correct 6 ms 1368 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 5 ms 344 KB Output is correct
8 Correct 7 ms 600 KB Output is correct
9 Correct 5 ms 600 KB Output is correct
10 Correct 5 ms 1112 KB Output is correct
11 Correct 7 ms 1368 KB Output is correct
12 Correct 5 ms 1220 KB Output is correct
13 Correct 6 ms 856 KB Output is correct
14 Correct 6 ms 344 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Correct 7 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 6 ms 1112 KB Output is correct
20 Correct 6 ms 1112 KB Output is correct
21 Correct 7 ms 1640 KB Output is correct
22 Correct 6 ms 1356 KB Output is correct
23 Correct 7 ms 1364 KB Output is correct
24 Correct 7 ms 1628 KB Output is correct
25 Correct 8 ms 344 KB Output is correct
26 Correct 7 ms 344 KB Output is correct
27 Correct 7 ms 344 KB Output is correct
28 Correct 7 ms 344 KB Output is correct
29 Correct 7 ms 344 KB Output is correct
30 Correct 5 ms 584 KB Output is correct
31 Correct 6 ms 584 KB Output is correct
32 Correct 6 ms 836 KB Output is correct
33 Correct 6 ms 600 KB Output is correct
34 Correct 6 ms 856 KB Output is correct
35 Correct 7 ms 600 KB Output is correct
36 Correct 6 ms 1240 KB Output is correct
37 Correct 7 ms 1256 KB Output is correct
38 Correct 8 ms 1852 KB Output is correct
39 Correct 7 ms 1116 KB Output is correct
40 Correct 7 ms 1404 KB Output is correct
41 Correct 8 ms 1404 KB Output is correct
42 Correct 7 ms 1112 KB Output is correct
43 Correct 8 ms 1400 KB Output is correct
44 Correct 8 ms 1572 KB Output is correct
45 Correct 11 ms 344 KB Output is correct
46 Correct 9 ms 344 KB Output is correct
47 Correct 10 ms 344 KB Output is correct
48 Correct 9 ms 344 KB Output is correct
49 Correct 9 ms 344 KB Output is correct
50 Correct 7 ms 844 KB Output is correct
51 Correct 8 ms 584 KB Output is correct
52 Correct 10 ms 776 KB Output is correct
53 Correct 8 ms 860 KB Output is correct
54 Correct 7 ms 856 KB Output is correct
55 Correct 7 ms 856 KB Output is correct
56 Correct 6 ms 1384 KB Output is correct
57 Correct 7 ms 1660 KB Output is correct
58 Correct 9 ms 1916 KB Output is correct
59 Correct 12 ms 1712 KB Output is correct
60 Correct 10 ms 1700 KB Output is correct
61 Correct 9 ms 1136 KB Output is correct
62 Correct 8 ms 1316 KB Output is correct
63 Correct 8 ms 1808 KB Output is correct
64 Correct 10 ms 1308 KB Output is correct

Subtask #4
45.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 856 KB Output is correct
5 Correct 5 ms 856 KB Output is correct
6 Correct 9 ms 344 KB Output is correct
7 Correct 7 ms 344 KB Output is correct
8 Correct 5 ms 600 KB Output is correct
9 Correct 5 ms 600 KB Output is correct
10 Correct 5 ms 856 KB Output is correct
11 Correct 6 ms 1112 KB Output is correct
12 Correct 5 ms 1372 KB Output is correct
13 Correct 6 ms 1096 KB Output is correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 8 ms 344 KB Output is correct
16 Correct 10 ms 344 KB Output is correct
17 Correct 6 ms 344 KB Output is correct
18 Correct 5 ms 344 KB Output is correct
19 Correct 6 ms 1112 KB Output is correct
20 Correct 5 ms 856 KB Output is correct
21 Correct 6 ms 344 KB Output is correct
22 Correct 6 ms 344 KB Output is correct
23 Correct 6 ms 344 KB Output is correct
24 Correct 6 ms 344 KB Output is correct
25 Correct 8 ms 344 KB Output is correct
26 Correct 5 ms 588 KB Output is correct
27 Correct 6 ms 584 KB Output is correct
28 Correct 7 ms 840 KB Output is correct
29 Correct 6 ms 600 KB Output is correct
30 Correct 6 ms 856 KB Output is correct
31 Correct 8 ms 600 KB Output is correct
32 Correct 10 ms 344 KB Output is correct
33 Correct 8 ms 344 KB Output is correct
34 Correct 7 ms 344 KB Output is correct
35 Correct 8 ms 344 KB Output is correct
36 Correct 10 ms 344 KB Output is correct
37 Correct 7 ms 840 KB Output is correct
38 Correct 9 ms 844 KB Output is correct
39 Correct 9 ms 836 KB Output is correct
40 Correct 6 ms 600 KB Output is correct
41 Correct 8 ms 856 KB Output is correct
42 Correct 7 ms 856 KB Output is correct
43 Correct 7 ms 1612 KB Output is correct
44 Correct 7 ms 1356 KB Output is correct
45 Correct 6 ms 1144 KB Output is correct
46 Correct 6 ms 1536 KB Output is correct
47 Correct 7 ms 1112 KB Output is correct
48 Correct 7 ms 1388 KB Output is correct
49 Correct 8 ms 1488 KB Output is correct
50 Correct 8 ms 1148 KB Output is correct
51 Correct 7 ms 1412 KB Output is correct
52 Correct 7 ms 1368 KB Output is correct
53 Partially correct 7 ms 1112 KB Output is partially correct
54 Correct 8 ms 1392 KB Output is correct
55 Correct 8 ms 1640 KB Output is correct
56 Correct 7 ms 1144 KB Output is correct
57 Correct 7 ms 1144 KB Output is correct
58 Correct 9 ms 1532 KB Output is correct
59 Correct 8 ms 1148 KB Output is correct
60 Partially correct 8 ms 1628 KB Output is partially correct
61 Correct 7 ms 1112 KB Output is correct
62 Correct 6 ms 1248 KB Output is correct
63 Correct 7 ms 1404 KB Output is correct
64 Correct 7 ms 1384 KB Output is correct
65 Partially correct 8 ms 1180 KB Output is partially correct
66 Partially correct 11 ms 1460 KB Output is partially correct
67 Partially correct 10 ms 1328 KB Output is partially correct
68 Partially correct 9 ms 1660 KB Output is partially correct
69 Partially correct 8 ms 1564 KB Output is partially correct
70 Partially correct 10 ms 1576 KB Output is partially correct
71 Correct 8 ms 1148 KB Output is correct
72 Partially correct 9 ms 1684 KB Output is partially correct
73 Partially correct 8 ms 1628 KB Output is partially correct
74 Partially correct 9 ms 1576 KB Output is partially correct
75 Partially correct 9 ms 1368 KB Output is partially correct
76 Partially correct 8 ms 1136 KB Output is partially correct
77 Correct 10 ms 1148 KB Output is correct
78 Correct 9 ms 1920 KB Output is correct
79 Partially correct 8 ms 1948 KB Output is partially correct
80 Partially correct 9 ms 1448 KB Output is partially correct
81 Partially correct 9 ms 1148 KB Output is partially correct
82 Partially correct 8 ms 1368 KB Output is partially correct