| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 362880 |
2021-02-04T14:50:58 Z |
David_M |
Race (IOI11_race) |
C++17 |
|
487 ms |
79212 KB |
#include "race.h"
#include<bits/stdc++.h>
using namespace std;
const int N=200005;
int sz[N], e[N], z1[N], z2[N], o, k, K, Ans=N;
vector <pair<int, int> > v[N];
map<int, int> m[N];
void solve(int x=0, int pa=0){
sz[x]=1;
int mx=0, Y, D;
for (auto [y,d]:v[x]){
if(y==pa)continue;
solve(y, x);
sz[x]+=sz[y];
if(sz[y]>mx) mx=sz[y], Y=y, D=d;
}
if(sz[x]==1) e[x]=o++;
else z1[x]=z1[Y]+D, z2[x]=z2[Y]+1, e[x]=e[Y];
m[e[x]][0-z1[x]]=0-z2[x];
for (auto [y,d]:v[x]){
if(y==pa||y==Y)continue;
for(auto [kk,ans]:m[e[y]]){
k=kk+d+z1[y]+z1[x];
ans+=1+z2[y]+z2[x];
if(m[e[x]].find(K-k)!=m[e[x]].end()) Ans=min(Ans, ans+m[e[x]][K-k]);
}
for(auto [kk,ans]:m[e[y]]){
k=kk+d+z1[y]-z1[x];
ans+=1+z2[y]-z2[x];
if(m[e[x]].find(k)==m[e[x]].end() || m[e[x]][k]>ans) m[e[x]][k]=ans;
}
}
if(m[e[x]].find(K-z1[x])!=m[e[x]].end())Ans=min(Ans,z2[x]+m[e[x]][K-z1[x]]);
}
int best_path(int n, int k, int H[][2], int L[]){
K=k;
for (int i=0; i<n-1; i++)
v[H[i][0]].push_back({H[i][1],L[i]}),
v[H[i][1]].push_back({H[i][0],L[i]});
solve();
return (Ans==N)?-1:Ans;
}
Compilation message
race.cpp: In function 'void solve(int, int)':
race.cpp:27:11: warning: 'Y' may be used uninitialized in this function [-Wmaybe-uninitialized]
27 | if(y==pa||y==Y)continue;
| ~~~~~^~~~~~
race.cpp:23:18: warning: 'D' may be used uninitialized in this function [-Wmaybe-uninitialized]
23 | else z1[x]=z1[Y]+D, z2[x]=z2[Y]+1, e[x]=e[Y];
| ~~~~~^~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 10 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 10 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 21 |
Correct |
12 ms |
14572 KB |
Output is correct |
| 22 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 23 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 24 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 26 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 27 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 29 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 30 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 32 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 33 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 34 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 35 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 36 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 38 |
Correct |
11 ms |
14572 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 10 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
124 ms |
30572 KB |
Output is correct |
| 20 |
Correct |
128 ms |
30652 KB |
Output is correct |
| 21 |
Correct |
125 ms |
30472 KB |
Output is correct |
| 22 |
Correct |
137 ms |
30700 KB |
Output is correct |
| 23 |
Correct |
179 ms |
41068 KB |
Output is correct |
| 24 |
Correct |
136 ms |
35436 KB |
Output is correct |
| 25 |
Correct |
93 ms |
33004 KB |
Output is correct |
| 26 |
Correct |
68 ms |
41964 KB |
Output is correct |
| 27 |
Correct |
224 ms |
40044 KB |
Output is correct |
| 28 |
Correct |
243 ms |
79212 KB |
Output is correct |
| 29 |
Correct |
249 ms |
76908 KB |
Output is correct |
| 30 |
Correct |
226 ms |
40044 KB |
Output is correct |
| 31 |
Correct |
230 ms |
40044 KB |
Output is correct |
| 32 |
Correct |
269 ms |
40172 KB |
Output is correct |
| 33 |
Correct |
232 ms |
39148 KB |
Output is correct |
| 34 |
Correct |
363 ms |
63932 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 2 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 3 |
Correct |
11 ms |
14444 KB |
Output is correct |
| 4 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 5 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 6 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 7 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 8 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 9 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 10 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 11 |
Correct |
12 ms |
14444 KB |
Output is correct |
| 12 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 13 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 14 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 15 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 16 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 17 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 18 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 19 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 20 |
Correct |
10 ms |
14444 KB |
Output is correct |
| 21 |
Correct |
12 ms |
14572 KB |
Output is correct |
| 22 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 23 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 24 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 25 |
Correct |
12 ms |
14828 KB |
Output is correct |
| 26 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 27 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 28 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 29 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 30 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 31 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 32 |
Correct |
13 ms |
14700 KB |
Output is correct |
| 33 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 34 |
Correct |
12 ms |
14700 KB |
Output is correct |
| 35 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 36 |
Correct |
11 ms |
14700 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 38 |
Correct |
11 ms |
14572 KB |
Output is correct |
| 39 |
Correct |
124 ms |
30572 KB |
Output is correct |
| 40 |
Correct |
128 ms |
30652 KB |
Output is correct |
| 41 |
Correct |
125 ms |
30472 KB |
Output is correct |
| 42 |
Correct |
137 ms |
30700 KB |
Output is correct |
| 43 |
Correct |
179 ms |
41068 KB |
Output is correct |
| 44 |
Correct |
136 ms |
35436 KB |
Output is correct |
| 45 |
Correct |
93 ms |
33004 KB |
Output is correct |
| 46 |
Correct |
68 ms |
41964 KB |
Output is correct |
| 47 |
Correct |
224 ms |
40044 KB |
Output is correct |
| 48 |
Correct |
243 ms |
79212 KB |
Output is correct |
| 49 |
Correct |
249 ms |
76908 KB |
Output is correct |
| 50 |
Correct |
226 ms |
40044 KB |
Output is correct |
| 51 |
Correct |
230 ms |
40044 KB |
Output is correct |
| 52 |
Correct |
269 ms |
40172 KB |
Output is correct |
| 53 |
Correct |
232 ms |
39148 KB |
Output is correct |
| 54 |
Correct |
363 ms |
63932 KB |
Output is correct |
| 55 |
Correct |
30 ms |
16876 KB |
Output is correct |
| 56 |
Correct |
20 ms |
15852 KB |
Output is correct |
| 57 |
Correct |
81 ms |
29420 KB |
Output is correct |
| 58 |
Correct |
67 ms |
26080 KB |
Output is correct |
| 59 |
Correct |
90 ms |
46700 KB |
Output is correct |
| 60 |
Correct |
249 ms |
77540 KB |
Output is correct |
| 61 |
Correct |
262 ms |
42860 KB |
Output is correct |
| 62 |
Correct |
213 ms |
40044 KB |
Output is correct |
| 63 |
Correct |
281 ms |
40300 KB |
Output is correct |
| 64 |
Correct |
482 ms |
78080 KB |
Output is correct |
| 65 |
Correct |
487 ms |
78828 KB |
Output is correct |
| 66 |
Correct |
263 ms |
71916 KB |
Output is correct |
| 67 |
Correct |
183 ms |
40668 KB |
Output is correct |
| 68 |
Correct |
376 ms |
54380 KB |
Output is correct |
| 69 |
Correct |
372 ms |
55020 KB |
Output is correct |
| 70 |
Correct |
336 ms |
52716 KB |
Output is correct |
