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답안 #292473

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
292473 2020-09-07T05:27:38 Z davooddkareshki 경주 (Race) (IOI11_race) C++17
100 / 100
 569 ms 97272 KB 
//#include "race.h"
#include<bits/stdc++.h>

using namespace std;

//#define int long long
#define F first
#define S second
#define pii pair<ll,ll>
#define mpr make_pair

typedef long long ll;

const int maxn = 2e5+10;
const int inf = 1e9+10;
const int mod = 1e9+7;

ll K;
map<ll,ll> *mp[maxn];
ll st[maxn], h[maxn], sum[maxn];
vector<pii> g[maxn];

void pfs(ll v, ll p = -1)
{
   st[v] = 1;
   for(auto e : g[v])
   {
      ll u = e.F, w = e.S;
      if(u != p)
      {
         sum[u] = sum[v] + w;
         h[u] = h[v] + 1;

         pfs(u,v);
         st[v] += st[u];
      }
   }
}

ll ans = inf;
void dfs(ll v, ll p = -1)
{
   ll big = -1;
   for(auto e : g[v])
   {
      int u = e.F;
      if(u != p)
      {
         dfs(u,v);
         if(big == -1) big = u;
         else if(st[u] > st[big]) big = u;
      }
   }

   if(big != -1) mp[v] = mp[big];
   else mp[v] = new map<ll,ll>;
   (*mp[v])[sum[v]] = h[v];

   if((*mp[v]).count(K+sum[v]))
      ans = min(ans, (*mp[v])[K+sum[v]] - h[v]);

   for(auto e : g[v])
   {
      ll u = e.F, w = e.S;
      if(u != p && u != big)
      {
         for(auto X : (*mp[u]))
         {
            ll sm = X.F, Mn = X.S;
            if((*mp[v]).count(K-sm+2*sum[v]))
            {
               ll road = Mn + (*mp[v])[K-sm+2*sum[v]] - 2 * h[v];
               ans = min(ans,road);
            }
         }

         for(auto X : (*mp[u]))
         {
            ll sm = X.F, Mn = X.S;
            if(!(*mp[v]).count(sm)) (*mp[v])[sm] = Mn;
            else (*mp[v])[sm] = min((*mp[v])[sm], Mn);
         }
      }
   }
}

int best_path(int n, int k, int h[][2], int l[])
{
   //cin>> n >> K;
   K = k;
   for(int i = 0, u, v, w; i < n-1; i++)
   {
      //cin>> u >> v >> w;
      u = h[i][0], v = h[i][1], w = l[i];
      u++; v++;
      g[u].push_back({v,w});
      g[v].push_back({u,w});
   }

   pfs(1); dfs(1);
   if(ans == inf) return -1;
   else return ans;
}

/*int main()
{
}*/

Compilation message

race.cpp: In function 'void dfs(ll, ll)':
race.cpp:64:19: warning: unused variable 'w' [-Wunused-variable]
   64 |       ll u = e.F, w = e.S;
      |                   ^

Subtask #1
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 5120 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct

Subtask #2
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 5120 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 4 ms 5120 KB Output is correct
20 Correct 4 ms 5120 KB Output is correct
21 Correct 5 ms 5376 KB Output is correct
22 Correct 5 ms 5376 KB Output is correct
23 Correct 6 ms 5376 KB Output is correct
24 Correct 5 ms 5376 KB Output is correct
25 Correct 6 ms 5376 KB Output is correct
26 Correct 5 ms 5376 KB Output is correct
27 Correct 5 ms 5248 KB Output is correct
28 Correct 5 ms 5376 KB Output is correct
29 Correct 5 ms 5376 KB Output is correct
30 Correct 5 ms 5376 KB Output is correct
31 Correct 5 ms 5376 KB Output is correct
32 Correct 5 ms 5376 KB Output is correct
33 Correct 5 ms 5376 KB Output is correct
34 Correct 5 ms 5248 KB Output is correct
35 Correct 4 ms 5248 KB Output is correct
36 Correct 5 ms 5248 KB Output is correct
37 Correct 5 ms 5248 KB Output is correct
38 Correct 5 ms 5248 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 5120 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 157 ms 28300 KB Output is correct
20 Correct 158 ms 29560 KB Output is correct
21 Correct 159 ms 29688 KB Output is correct
22 Correct 160 ms 30200 KB Output is correct
23 Correct 191 ms 44024 KB Output is correct
24 Correct 177 ms 38264 KB Output is correct
25 Correct 105 ms 23672 KB Output is correct
26 Correct 63 ms 29560 KB Output is correct
27 Correct 258 ms 46328 KB Output is correct
28 Correct 285 ms 66912 KB Output is correct
29 Correct 290 ms 65656 KB Output is correct
30 Correct 271 ms 46460 KB Output is correct
31 Correct 260 ms 46328 KB Output is correct
32 Correct 336 ms 46456 KB Output is correct
33 Correct 287 ms 38904 KB Output is correct
34 Correct 405 ms 71800 KB Output is correct

Subtask #4
57.0 / 57.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 4992 KB Output is correct
6 Correct 4 ms 5120 KB Output is correct
7 Correct 4 ms 5120 KB Output is correct
8 Correct 4 ms 5120 KB Output is correct
9 Correct 3 ms 5120 KB Output is correct
10 Correct 4 ms 5120 KB Output is correct
11 Correct 4 ms 5120 KB Output is correct
12 Correct 3 ms 5120 KB Output is correct
13 Correct 4 ms 5120 KB Output is correct
14 Correct 4 ms 5120 KB Output is correct
15 Correct 4 ms 5120 KB Output is correct
16 Correct 4 ms 5120 KB Output is correct
17 Correct 4 ms 5120 KB Output is correct
18 Correct 4 ms 5120 KB Output is correct
19 Correct 4 ms 5120 KB Output is correct
20 Correct 4 ms 5120 KB Output is correct
21 Correct 5 ms 5376 KB Output is correct
22 Correct 5 ms 5376 KB Output is correct
23 Correct 6 ms 5376 KB Output is correct
24 Correct 5 ms 5376 KB Output is correct
25 Correct 6 ms 5376 KB Output is correct
26 Correct 5 ms 5376 KB Output is correct
27 Correct 5 ms 5248 KB Output is correct
28 Correct 5 ms 5376 KB Output is correct
29 Correct 5 ms 5376 KB Output is correct
30 Correct 5 ms 5376 KB Output is correct
31 Correct 5 ms 5376 KB Output is correct
32 Correct 5 ms 5376 KB Output is correct
33 Correct 5 ms 5376 KB Output is correct
34 Correct 5 ms 5248 KB Output is correct
35 Correct 4 ms 5248 KB Output is correct
36 Correct 5 ms 5248 KB Output is correct
37 Correct 5 ms 5248 KB Output is correct
38 Correct 5 ms 5248 KB Output is correct
39 Correct 157 ms 28300 KB Output is correct
40 Correct 158 ms 29560 KB Output is correct
41 Correct 159 ms 29688 KB Output is correct
42 Correct 160 ms 30200 KB Output is correct
43 Correct 191 ms 44024 KB Output is correct
44 Correct 177 ms 38264 KB Output is correct
45 Correct 105 ms 23672 KB Output is correct
46 Correct 63 ms 29560 KB Output is correct
47 Correct 258 ms 46328 KB Output is correct
48 Correct 285 ms 66912 KB Output is correct
49 Correct 290 ms 65656 KB Output is correct
50 Correct 271 ms 46460 KB Output is correct
51 Correct 260 ms 46328 KB Output is correct
52 Correct 336 ms 46456 KB Output is correct
53 Correct 287 ms 38904 KB Output is correct
54 Correct 405 ms 71800 KB Output is correct
55 Correct 20 ms 8608 KB Output is correct
56 Correct 12 ms 7168 KB Output is correct
57 Correct 99 ms 29092 KB Output is correct
58 Correct 74 ms 27624 KB Output is correct
59 Correct 90 ms 35832 KB Output is correct
60 Correct 269 ms 65784 KB Output is correct
61 Correct 294 ms 49784 KB Output is correct
62 Correct 255 ms 46328 KB Output is correct
63 Correct 329 ms 46456 KB Output is correct
64 Correct 569 ms 95736 KB Output is correct
65 Correct 562 ms 97272 KB Output is correct
66 Correct 297 ms 63096 KB Output is correct
67 Correct 265 ms 51296 KB Output is correct
68 Correct 453 ms 66552 KB Output is correct
69 Correct 437 ms 67192 KB Output is correct
70 Correct 463 ms 63736 KB Output is correct