oj.uz

Submission #110460

# Submission time Handle Problem Language Result Execution time Memory
110460 2019-05-10T21:12:41 Z ioilolcom Dreaming (IOI13_dreaming) C++14
18 / 100
 272 ms 24412 KB 
#include "dreaming.h"
#include <bits/stdc++.h>
#define y second
#define x  first
#define ll long long int
#define pb push_back
#define pii pair<int,int>
using namespace std;
const int N=1e5+7;
vector<pair<int,int> > adj[N];
bool vis[N];
void dfs(int node,int p,int length,pii &ans){
	vis[node]=1;
	for(auto vertice:adj[node]) {
		if(vertice.x==p) {
			continue;
		}
		dfs(vertice.x,node,length+vertice.y,ans);
	}
	if(length>ans.y) {
		ans.x=node;
		ans.y=length;
	}
}
bool fn(int node, int pnode, int target,vector<int> &path){
	if(node == target) return 1;
	for(auto &i : adj[node]) {
		if(i.first == pnode) continue;
		if(fn(i.first, node, target,path) == 0) continue;
		path.push_back(i.first);
		return 1;
	}
	return 0;
}
int travelTime(int N, int M, int L, int A[], int B[], int T[]) {
	int n=N;
	int m=M;
	int l=L;
	vector<int> radius;
	map<pair<int,int>,int> cost;
	for(int i=0; i<M; i++) {
		int u=A[i];
		int v=B[i];
		int w=T[i];
		adj[u].pb({v,w});
		adj[v].pb({u,w});
		cost[{u,v}]=cost[{v,u}]=w;
	}
	int d=0;
	for(int i=0; i<n; i++) {
		if(vis[i]) continue;
		pii s={-1,-1};
		dfs(i,-1,0,s);
		pii e={-1,-1};
		dfs(s.first,-1,0,e);
		int diameter=e.y;
		vector<int> path;
		fn(s.x,e.x,0,path);
		int sz=(int)path.size();
		int rad=diameter;
		int cur=diameter;
		d=max(d,diameter);
		for(int j=1; j<sz; j++) {
			cur-=cost[{path[j],path[j-1]}];
			rad=min(rad,max(diameter-cur,cur));
		}
		radius.push_back(rad);
	}
	int szz=(int)radius.size();
	if(szz==1) return d;
	sort(radius.rbegin(),radius.rend());

	if(szz==2) {
		//        lol=max(lol,radius[0]+radius[1]+l);
		return max(d,radius[0]+radius[1]+l);
	}
	return max(d,max(radius[0]+radius[1]+l,radius[1]+radius[2]+2*l));


}

Compilation message

dreaming.cpp: In function 'int travelTime(int, int, int, int*, int*, int*)':
dreaming.cpp:37:6: warning: unused variable 'm' [-Wunused-variable]
  int m=M;
      ^

Subtask #1
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 246 ms 24412 KB Output is correct
2 Correct 272 ms 24184 KB Output is correct
3 Correct 146 ms 17272 KB Output is correct
4 Correct 22 ms 5888 KB Output is correct
5 Incorrect 18 ms 4736 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 246 ms 24412 KB Output is correct
2 Correct 272 ms 24184 KB Output is correct
3 Correct 146 ms 17272 KB Output is correct
4 Correct 22 ms 5888 KB Output is correct
5 Incorrect 18 ms 4736 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 246 ms 24412 KB Output is correct
2 Correct 272 ms 24184 KB Output is correct
3 Correct 146 ms 17272 KB Output is correct
4 Correct 22 ms 5888 KB Output is correct
5 Incorrect 18 ms 4736 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 69 ms 9336 KB Output is correct
2 Correct 75 ms 9476 KB Output is correct
3 Correct 59 ms 9464 KB Output is correct
4 Correct 62 ms 9336 KB Output is correct
5 Correct 71 ms 9360 KB Output is correct
6 Correct 78 ms 10100 KB Output is correct
7 Correct 72 ms 9720 KB Output is correct
8 Correct 58 ms 9208 KB Output is correct
9 Correct 64 ms 9292 KB Output is correct
10 Correct 69 ms 9592 KB Output is correct
11 Correct 3 ms 2688 KB Output is correct
12 Correct 7 ms 3452 KB Output is correct
13 Correct 8 ms 3584 KB Output is correct
14 Correct 7 ms 3452 KB Output is correct
15 Correct 7 ms 3456 KB Output is correct
16 Correct 7 ms 3452 KB Output is correct
17 Correct 7 ms 3452 KB Output is correct
18 Correct 8 ms 3580 KB Output is correct
19 Correct 7 ms 3452 KB Output is correct
20 Correct 3 ms 2688 KB Output is correct
21 Correct 4 ms 2688 KB Output is correct
22 Correct 4 ms 2688 KB Output is correct
23 Correct 7 ms 3452 KB Output is correct

Subtask #5
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 246 ms 24412 KB Output is correct
2 Correct 272 ms 24184 KB Output is correct
3 Correct 146 ms 17272 KB Output is correct
4 Correct 22 ms 5888 KB Output is correct
5 Incorrect 18 ms 4736 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #6
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 246 ms 24412 KB Output is correct
2 Correct 272 ms 24184 KB Output is correct
3 Correct 146 ms 17272 KB Output is correct
4 Correct 22 ms 5888 KB Output is correct
5 Incorrect 18 ms 4736 KB Output isn't correct
6 Halted 0 ms 0 KB -