oj.uz

Submission #820087

# Submission time Handle Problem Language Result Execution time Memory
820087 2023-08-10T19:05:48 Z ttamx Highway Tolls (IOI18_highway) C++14
100 / 100
 156 ms 13068 KB 
#include "highway.h"
#include<bits/stdc++.h>

using namespace std;

typedef pair<int,int> p2;
typedef tuple<int,int,int> t3;

const int N=90005;
const int M=130005;

int n,m,a,b;
vector<int> e;
vector<int> edge1(M),edge2(M),dist1(N),dist2(N);
vector<p2> adj[N];
long long cost;
vector<t3> group1,group2;
int type[M];
int mainedge;

void bfs(int st,vector<int> &dist,vector<int> &edge){
	queue<int> q;
	edge[st]=mainedge;
	dist[st]=1;
	q.emplace(st);
	while(!q.empty()){
		auto u=q.front();
		q.pop();
		for(auto [v,id]:adj[u]){
			if(dist[v])continue;
			edge[v]=id;
			dist[v]=dist[u]+1;
			q.emplace(v);
		}
	}
}

int sol1(){
	int l=0,r=m-1;
	while(l<r){
		int mid=(l+r)/2;
		for(int i=0;i<m;i++)e[i]=i<=mid;
		if(ask(e)!=cost)r=mid;
		else l=mid+1;
	}
	return l;
}

int sol2(vector<t3> &ingroup,vector<t3> &exgroup){
	int l=0,r=ingroup.size()-1;
	while(l<r){
		int mid=(l+r)/2;
		e=vector<int>(m,1);
		for(auto x:exgroup)e[get<2>(x)]=0;
		for(int i=1;i<=mid;i++)e[get<2>(ingroup[i])]=0;
		if(ask(e)==cost)r=mid;
		else l=mid+1;
	}
	return get<1>(ingroup[l]);
}

void find_pair(int n, vector<int> U, vector<int> V, int A, int B){
	a=A,b=B;
	m=U.size();
	for(int i=0;i<m;i++){
		int u=U[i],v=V[i];
		adj[u].emplace_back(v,i);
		adj[v].emplace_back(u,i);
	}
	e=vector<int>(m,0);
	cost=ask(e);
	mainedge=sol1();
	int st1=U[mainedge];
	int st2=V[mainedge];
	bfs(st1,dist1,edge1);
	bfs(st2,dist2,edge2);
	for(int i=0;i<n;i++){
		if(dist1[i]<dist2[i])group1.emplace_back(dist1[i],i,edge1[i]);
		if(dist2[i]<dist1[i])group2.emplace_back(dist2[i],i,edge2[i]);
	}
	sort(group1.begin(),group1.end());
	sort(group2.begin(),group2.end());
	int ans1=sol2(group1,group2);
	int ans2=sol2(group2,group1);
	answer(ans1,ans2);
}

Compilation message

highway.cpp: In function 'void bfs(int, std::vector<int>&, std::vector<int>&)':
highway.cpp:29:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   29 |   for(auto [v,id]:adj[u]){
      |            ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4048 KB Output is correct
2 Correct 2 ms 4048 KB Output is correct
3 Correct 2 ms 4160 KB Output is correct
4 Correct 2 ms 4048 KB Output is correct
5 Correct 2 ms 4048 KB Output is correct
6 Correct 2 ms 4176 KB Output is correct
7 Correct 2 ms 4164 KB Output is correct
8 Correct 2 ms 4048 KB Output is correct
9 Correct 2 ms 4048 KB Output is correct
10 Correct 2 ms 4100 KB Output is correct
11 Correct 2 ms 4048 KB Output is correct
12 Correct 2 ms 4048 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4304 KB Output is correct
2 Correct 10 ms 4992 KB Output is correct
3 Correct 97 ms 10940 KB Output is correct
4 Correct 92 ms 10944 KB Output is correct
5 Correct 88 ms 10956 KB Output is correct
6 Correct 82 ms 10972 KB Output is correct
7 Correct 98 ms 10932 KB Output is correct
8 Correct 88 ms 10912 KB Output is correct
9 Correct 87 ms 10968 KB Output is correct
10 Correct 96 ms 10936 KB Output is correct
11 Correct 96 ms 10144 KB Output is correct
12 Correct 93 ms 10764 KB Output is correct
13 Correct 100 ms 10336 KB Output is correct
14 Correct 92 ms 10404 KB Output is correct

Subtask #3
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 4944 KB Output is correct
2 Correct 17 ms 5596 KB Output is correct
3 Correct 25 ms 6184 KB Output is correct
4 Correct 69 ms 10264 KB Output is correct
5 Correct 76 ms 10264 KB Output is correct
6 Correct 68 ms 10528 KB Output is correct
7 Correct 72 ms 10348 KB Output is correct
8 Correct 63 ms 10140 KB Output is correct
9 Correct 72 ms 10336 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4176 KB Output is correct
2 Correct 11 ms 4944 KB Output is correct
3 Correct 97 ms 9804 KB Output is correct
4 Correct 90 ms 10920 KB Output is correct
5 Correct 83 ms 10876 KB Output is correct
6 Correct 86 ms 10992 KB Output is correct
7 Correct 93 ms 10988 KB Output is correct
8 Correct 84 ms 10956 KB Output is correct
9 Correct 97 ms 10944 KB Output is correct
10 Correct 90 ms 10952 KB Output is correct
11 Correct 104 ms 10324 KB Output is correct
12 Correct 110 ms 10500 KB Output is correct
13 Correct 133 ms 10824 KB Output is correct
14 Correct 109 ms 10144 KB Output is correct
15 Correct 80 ms 10892 KB Output is correct
16 Correct 92 ms 10904 KB Output is correct
17 Correct 97 ms 10408 KB Output is correct
18 Correct 114 ms 10336 KB Output is correct
19 Correct 94 ms 10872 KB Output is correct
20 Correct 102 ms 10376 KB Output is correct
21 Correct 75 ms 11632 KB Output is correct
22 Correct 111 ms 11732 KB Output is correct
23 Correct 91 ms 11200 KB Output is correct
24 Correct 90 ms 10960 KB Output is correct
25 Correct 88 ms 10492 KB Output is correct

Subtask #5
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 4944 KB Output is correct
2 Correct 14 ms 5064 KB Output is correct
3 Correct 105 ms 11296 KB Output is correct
4 Correct 121 ms 11836 KB Output is correct
5 Correct 132 ms 12744 KB Output is correct
6 Correct 150 ms 12644 KB Output is correct
7 Correct 129 ms 12772 KB Output is correct
8 Correct 132 ms 12496 KB Output is correct
9 Correct 113 ms 10512 KB Output is correct
10 Correct 90 ms 10956 KB Output is correct
11 Correct 111 ms 11472 KB Output is correct
12 Correct 124 ms 12056 KB Output is correct
13 Correct 140 ms 12368 KB Output is correct
14 Correct 128 ms 12576 KB Output is correct
15 Correct 145 ms 12684 KB Output is correct
16 Correct 117 ms 11464 KB Output is correct
17 Correct 83 ms 11204 KB Output is correct
18 Correct 85 ms 11440 KB Output is correct
19 Correct 83 ms 11260 KB Output is correct
20 Correct 88 ms 11324 KB Output is correct
21 Correct 144 ms 12976 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 4944 KB Output is correct
2 Correct 14 ms 5132 KB Output is correct
3 Correct 109 ms 11036 KB Output is correct
4 Correct 123 ms 11568 KB Output is correct
5 Correct 133 ms 11652 KB Output is correct
6 Correct 137 ms 12660 KB Output is correct
7 Correct 104 ms 11336 KB Output is correct
8 Correct 111 ms 11488 KB Output is correct
9 Correct 117 ms 11404 KB Output is correct
10 Correct 130 ms 12504 KB Output is correct
11 Correct 131 ms 12712 KB Output is correct
12 Correct 128 ms 12524 KB Output is correct
13 Correct 105 ms 11408 KB Output is correct
14 Correct 87 ms 10904 KB Output is correct
15 Correct 105 ms 11456 KB Output is correct
16 Correct 96 ms 10964 KB Output is correct
17 Correct 108 ms 11360 KB Output is correct
18 Correct 90 ms 11000 KB Output is correct
19 Correct 119 ms 12000 KB Output is correct
20 Correct 133 ms 12496 KB Output is correct
21 Correct 128 ms 12752 KB Output is correct
22 Correct 137 ms 12548 KB Output is correct
23 Correct 136 ms 12460 KB Output is correct
24 Correct 138 ms 12544 KB Output is correct
25 Correct 139 ms 12844 KB Output is correct
26 Correct 145 ms 12852 KB Output is correct
27 Correct 94 ms 11288 KB Output is correct
28 Correct 84 ms 11204 KB Output is correct
29 Correct 82 ms 11460 KB Output is correct
30 Correct 99 ms 11232 KB Output is correct
31 Correct 90 ms 11196 KB Output is correct
32 Correct 87 ms 11212 KB Output is correct
33 Correct 79 ms 11376 KB Output is correct
34 Correct 83 ms 11204 KB Output is correct
35 Correct 82 ms 11276 KB Output is correct
36 Correct 90 ms 11080 KB Output is correct
37 Correct 125 ms 11328 KB Output is correct
38 Correct 90 ms 11344 KB Output is correct
39 Correct 156 ms 13068 KB Output is correct
40 Correct 150 ms 12880 KB Output is correct
41 Correct 123 ms 12672 KB Output is correct
42 Correct 149 ms 12712 KB Output is correct