oj.uz

Submission #226791

# Submission time Handle Problem Language Result Execution time Memory
226791 2020-04-25T10:46:09 Z bharat2002 Race (IOI11_race) C++14
100 / 100
 986 ms 30456 KB 
/*input
11 12
0 1 3
0 2 4
2 3 5
3 4 4
4 5 6
0 6 3
6 7 2
6 8 5
8 9 6
8 10 7
*/
#include<bits/stdc++.h>
#include "race.h"
using namespace std;
const int N=2e5 + 100;
const int mod=1e9 + 7;
const int inf=1e7;
#define pii pair<int, int>
#define f first
#define s second 
#define mp make_pair
//Trace prints the name of the variable and the value.
int k, n;vector< pii > adjlist[N];
queue<int> roots;bool cent[N];
class Cent
{		
	bool visited[N];
	int sum[N];stack<int> cvals;
	void dfs(int i)
	{
		sum[i]=1;visited[i]=1;
		for(auto j:adjlist[i])
		{
			if(visited[j.f]||cent[j.f]) continue;
			dfs(j.f);sum[i]+=sum[j.f];
		}
		cvals.push(i);
	}
	public:
	void init() {
		for(int i=1;i<=n;i++) {visited[i]=0;sum[i]=0;}
	}
	bool solve()
	{
		init();bool check=0;
		for(int i=1;i<=n;i++)
		{
			if(visited[i]||cent[i]) continue;check=1;
			dfs(i);int tot=sum[cvals.top()];int cr, mval=inf;
			while(!cvals.empty())
			{	
				int cmax=tot-sum[cvals.top()];
				for(auto j:adjlist[cvals.top()])
				{
					if(sum[j.f]>sum[cvals.top()]||cent[j.f]) continue;
					cmax=max(cmax, sum[j.f]);
				}
				if(cmax<mval) 
				{
					mval=cmax;cr=cvals.top();
				}
				cvals.pop();
			}	
			roots.push(cr);cent[cr]=1;
		}
		return check;
	}
};
int tally[N*5];int optans;
void query(int i, int p, int depth, int dist)
{
	if(dist>k) return;
	if(tally[k-dist]!=inf)
	{
		optans=min(optans, tally[k-dist] + depth);
	}
	for(auto j:adjlist[i])
	{
		if(cent[j.f]||j.f==p) continue;
		query(j.f, i, depth+1, dist+j.s);
	}
}
void update(int i, int p, int depth, int dist, int ind)
{
	if(dist>k) return;
	if(ind==0) tally[dist]=min(tally[dist], depth);
	else tally[dist]=inf;
	for(auto j:adjlist[i])
	{
		if(cent[j.f]||j.f==p) continue;
		update(j.f, i, depth+1, dist+j.s, ind);
	}
}
Cent obj;
int best_path(int NC, int K, int H[][2], int L[])
{
	n=NC;k=K;optans=inf;
	for(int i=0;i<=k;i++) tally[i]=inf;
	for(int i=1;i<=n;i++) cent[i]=0;
	for(int i=0;i<n-1;i++)
	{
		adjlist[H[i][0]+1].push_back(mp(H[i][1]+1, L[i]));adjlist[H[i][1]+1].push_back(mp(H[i][0]+1, L[i]));
	}
	tally[0]=0;int iter=0;
	while(obj.solve())
	{
		while(!roots.empty())
		{
			int cur=roots.front();
			for(auto j:adjlist[cur])
			{
				if(cent[j.f]) continue;
				query(j.f, cur, 1, j.s);update(j.f, cur, 1, j.s, 0);
			}
			for(auto j:adjlist[cur])
			{
				if(cent[j.f]) continue;
				update(j.f, cur, 1, j.s, 1);
			}
			roots.pop();
		}
	}	
	if(optans==inf) return -1;return optans;
}
/*signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int NC, K, H[N][2], L[N];
	cin>>NC>>K;
	for(int i=0;i<NC-1;i++)
	{
		cin>>H[i][0]>>H[i][1]>>L[i];
	}
	cout<<best_path(NC, K, H, L);
}*/

Compilation message

race.cpp: In member function 'bool Cent::solve()':
race.cpp:50:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
    if(visited[i]||cent[i]) continue;check=1;
    ^~
race.cpp:50:37: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
    if(visited[i]||cent[i]) continue;check=1;
                                     ^~~~~
race.cpp: In function 'int best_path(int, int, int (*)[2], int*)':
race.cpp:125:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if(optans==inf) return -1;return optans;
  ^~
race.cpp:125:28: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
  if(optans==inf) return -1;return optans;
                            ^~~~~~
race.cpp:106:17: warning: unused variable 'iter' [-Wunused-variable]
  tally[0]=0;int iter=0;
                 ^~~~

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Correct 8 ms 5120 KB Output is correct
22 Correct 10 ms 8704 KB Output is correct
23 Correct 11 ms 8064 KB Output is correct
24 Correct 10 ms 8448 KB Output is correct
25 Correct 10 ms 8448 KB Output is correct
26 Correct 9 ms 6400 KB Output is correct
27 Correct 10 ms 8192 KB Output is correct
28 Correct 9 ms 5888 KB Output is correct
29 Correct 9 ms 6400 KB Output is correct
30 Correct 9 ms 6528 KB Output is correct
31 Correct 10 ms 7680 KB Output is correct
32 Correct 10 ms 7936 KB Output is correct
33 Correct 10 ms 8192 KB Output is correct
34 Correct 9 ms 7424 KB Output is correct
35 Correct 11 ms 8320 KB Output is correct
36 Correct 10 ms 8704 KB Output is correct
37 Correct 10 ms 8192 KB Output is correct
38 Correct 9 ms 7168 KB Output is correct

Subtask #3
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 250 ms 12356 KB Output is correct
20 Correct 240 ms 12280 KB Output is correct
21 Correct 246 ms 12280 KB Output is correct
22 Correct 238 ms 12280 KB Output is correct
23 Correct 148 ms 12536 KB Output is correct
24 Correct 91 ms 12412 KB Output is correct
25 Correct 192 ms 13944 KB Output is correct
26 Correct 126 ms 15864 KB Output is correct
27 Correct 287 ms 19832 KB Output is correct
28 Correct 466 ms 27000 KB Output is correct
29 Correct 434 ms 26488 KB Output is correct
30 Correct 301 ms 19832 KB Output is correct
31 Correct 287 ms 19836 KB Output is correct
32 Correct 473 ms 19832 KB Output is correct
33 Correct 482 ms 18552 KB Output is correct
34 Correct 383 ms 19528 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5120 KB Output is correct
2 Correct 7 ms 5120 KB Output is correct
3 Correct 7 ms 5120 KB Output is correct
4 Correct 7 ms 5120 KB Output is correct
5 Correct 7 ms 4992 KB Output is correct
6 Correct 7 ms 5120 KB Output is correct
7 Correct 7 ms 5120 KB Output is correct
8 Correct 7 ms 5120 KB Output is correct
9 Correct 7 ms 5120 KB Output is correct
10 Correct 7 ms 5120 KB Output is correct
11 Correct 7 ms 5120 KB Output is correct
12 Correct 7 ms 5120 KB Output is correct
13 Correct 7 ms 5120 KB Output is correct
14 Correct 7 ms 5120 KB Output is correct
15 Correct 7 ms 5120 KB Output is correct
16 Correct 7 ms 5120 KB Output is correct
17 Correct 7 ms 5120 KB Output is correct
18 Correct 7 ms 5120 KB Output is correct
19 Correct 7 ms 4992 KB Output is correct
20 Correct 7 ms 5120 KB Output is correct
21 Correct 8 ms 5120 KB Output is correct
22 Correct 10 ms 8704 KB Output is correct
23 Correct 11 ms 8064 KB Output is correct
24 Correct 10 ms 8448 KB Output is correct
25 Correct 10 ms 8448 KB Output is correct
26 Correct 9 ms 6400 KB Output is correct
27 Correct 10 ms 8192 KB Output is correct
28 Correct 9 ms 5888 KB Output is correct
29 Correct 9 ms 6400 KB Output is correct
30 Correct 9 ms 6528 KB Output is correct
31 Correct 10 ms 7680 KB Output is correct
32 Correct 10 ms 7936 KB Output is correct
33 Correct 10 ms 8192 KB Output is correct
34 Correct 9 ms 7424 KB Output is correct
35 Correct 11 ms 8320 KB Output is correct
36 Correct 10 ms 8704 KB Output is correct
37 Correct 10 ms 8192 KB Output is correct
38 Correct 9 ms 7168 KB Output is correct
39 Correct 250 ms 12356 KB Output is correct
40 Correct 240 ms 12280 KB Output is correct
41 Correct 246 ms 12280 KB Output is correct
42 Correct 238 ms 12280 KB Output is correct
43 Correct 148 ms 12536 KB Output is correct
44 Correct 91 ms 12412 KB Output is correct
45 Correct 192 ms 13944 KB Output is correct
46 Correct 126 ms 15864 KB Output is correct
47 Correct 287 ms 19832 KB Output is correct
48 Correct 466 ms 27000 KB Output is correct
49 Correct 434 ms 26488 KB Output is correct
50 Correct 301 ms 19832 KB Output is correct
51 Correct 287 ms 19836 KB Output is correct
52 Correct 473 ms 19832 KB Output is correct
53 Correct 482 ms 18552 KB Output is correct
54 Correct 383 ms 19528 KB Output is correct
55 Correct 20 ms 5760 KB Output is correct
56 Correct 22 ms 5760 KB Output is correct
57 Correct 115 ms 12412 KB Output is correct
58 Correct 53 ms 12260 KB Output is correct
59 Correct 132 ms 16632 KB Output is correct
60 Correct 785 ms 30456 KB Output is correct
61 Correct 310 ms 19960 KB Output is correct
62 Correct 357 ms 23800 KB Output is correct
63 Correct 579 ms 23804 KB Output is correct
64 Correct 986 ms 22136 KB Output is correct
65 Correct 440 ms 20856 KB Output is correct
66 Correct 641 ms 29176 KB Output is correct
67 Correct 142 ms 24548 KB Output is correct
68 Correct 496 ms 24476 KB Output is correct
69 Correct 491 ms 24700 KB Output is correct
70 Correct 477 ms 23928 KB Output is correct