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Submission #549535

# Submission time Handle Problem Language Result Execution time Memory
549535 2022-04-16T02:40:55 Z truc12a2cvp Swapping Cities (APIO20_swap) C++14
100 / 100
 381 ms 62576 KB 
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> II;
const int maxn = 3e5 + 5, logN = 20;
const int MOD = 1e9 + 7;
const ll INF = 1e9;

struct edge{
       int u, v, w;
       edge(int _u = 0, int _v = 0, int _w = 0) : u(_u), v(_v), w(_w) {}
       bool operator < (const edge &op) const{
              return w < op.w;
       }
}ed[maxn];

int n, m, par[maxn], f[maxn][logN], up[maxn], L[maxn], R[maxn], depth[maxn], val[maxn];
vector<int> g[maxn];
bool isline[maxn];

int get(int u){
       if(par[u] != u) par[u] = get(par[u]);
       return par[u];
}

void dfs(int u, int p){
       up[u] = ((isline[u] == false) ? u : up[p]);
       depth[u] = depth[p] + 1;
       f[u][0] = p;
       for(int i = 1; i < logN; i ++) f[u][i] = f[f[u][i - 1]][i - 1];
       for(int v : g[u]){
              dfs(v, u);
       }
}

int lca(int u, int v){
       if(depth[u] < depth[v]) swap(u, v);
       for(int i = logN - 1; i >= 0; i --){
              if(depth[f[u][i]] >= depth[v]) u = f[u][i];
       }
       if(u == v) return u;
       for(int i = logN - 1; i >= 0; i --){
              if(f[u][i] != f[v][i]) u = f[u][i], v = f[v][i];
       }
       return f[u][0];
}

void init(int N, int M, vector<int> U, vector<int> V, vector<int> W){
       n = N, m = M;
       for(int i = 1; i <= m; i ++) ed[i] = edge(U[i - 1] + 1, V[i - 1] + 1, W[i - 1]);
       sort(ed + 1, ed + m + 1);
       for(int i = 1; i <= n; i ++) L[i] = R[i] = i, isline[i] = true;
       for(int i = 1; i <= n + m; i ++) par[i] = i;
       for(int i = 1; i <= m; i ++){
              int u = ed[i].u, v = ed[i].v, w = ed[i].w;
              u = get(u), v = get(v);
              par[u] = par[v] = i + n;
              val[i + n] = w;
              isline[i + n] = (isline[u] && isline[v] && (u != v));
              bool flag = false;
              if(isline[i + n]){
                     bool flag = false;
                     for(int x : {L[u], R[u]}){
                            for(int y : {L[v], R[v]}){
                                   if((x == ed[i].u && y == ed[i].v) || (x == ed[i].v && y == ed[i].u)){
                                          L[i + n] = L[u] ^ R[u] ^ x;
                                          R[i + n] = L[v] ^ R[v] ^ y;
                                          flag = true;
                                          break;
                                   }
                            }
                     }
                     isline[i + n] &= flag;
              }
              g[i + n].push_back(u);
              if(u != v) g[i + n].push_back(v);
       }
       dfs(n + m, 0);
}

int getMinimumFuelCapacity(int X, int Y){
       if(isline[n + m]) return -1;
       return val[up[lca(X + 1, Y + 1)]];
}

Compilation message

swap.cpp: In function 'void init(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
swap.cpp:60:20: warning: unused variable 'flag' [-Wunused-variable]
   60 |               bool flag = false;
      |                    ^~~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 5 ms 10836 KB Output is correct
4 Correct 6 ms 10964 KB Output is correct
5 Correct 6 ms 11092 KB Output is correct
6 Correct 6 ms 11092 KB Output is correct
7 Correct 6 ms 11092 KB Output is correct
8 Correct 6 ms 11092 KB Output is correct
9 Correct 95 ms 31012 KB Output is correct
10 Correct 116 ms 35440 KB Output is correct
11 Correct 113 ms 34996 KB Output is correct
12 Correct 124 ms 36572 KB Output is correct
13 Correct 108 ms 38044 KB Output is correct
14 Correct 104 ms 31140 KB Output is correct
15 Correct 166 ms 37512 KB Output is correct
16 Correct 161 ms 36860 KB Output is correct
17 Correct 169 ms 38304 KB Output is correct
18 Correct 149 ms 39820 KB Output is correct
19 Correct 96 ms 18404 KB Output is correct
20 Correct 246 ms 38728 KB Output is correct
21 Correct 248 ms 38056 KB Output is correct
22 Correct 275 ms 39704 KB Output is correct
23 Correct 381 ms 41208 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 302 ms 40336 KB Output is correct
4 Correct 294 ms 45612 KB Output is correct
5 Correct 308 ms 44912 KB Output is correct
6 Correct 286 ms 45308 KB Output is correct
7 Correct 299 ms 45284 KB Output is correct
8 Correct 289 ms 44064 KB Output is correct
9 Correct 280 ms 45032 KB Output is correct
10 Correct 287 ms 43804 KB Output is correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 5 ms 10836 KB Output is correct
4 Correct 6 ms 10964 KB Output is correct
5 Correct 6 ms 11092 KB Output is correct
6 Correct 6 ms 11092 KB Output is correct
7 Correct 6 ms 11092 KB Output is correct
8 Correct 6 ms 11092 KB Output is correct
9 Correct 5 ms 10836 KB Output is correct
10 Correct 6 ms 11092 KB Output is correct
11 Correct 6 ms 11152 KB Output is correct
12 Correct 7 ms 11092 KB Output is correct
13 Correct 7 ms 11092 KB Output is correct
14 Correct 6 ms 11156 KB Output is correct
15 Correct 7 ms 11092 KB Output is correct
16 Correct 6 ms 11156 KB Output is correct
17 Correct 6 ms 11112 KB Output is correct
18 Correct 6 ms 11156 KB Output is correct
19 Correct 6 ms 11092 KB Output is correct
20 Correct 6 ms 11124 KB Output is correct
21 Correct 6 ms 11156 KB Output is correct
22 Correct 6 ms 11192 KB Output is correct
23 Correct 6 ms 11104 KB Output is correct
24 Correct 7 ms 11348 KB Output is correct
25 Correct 8 ms 11256 KB Output is correct
26 Correct 7 ms 11348 KB Output is correct
27 Correct 6 ms 11092 KB Output is correct
28 Correct 8 ms 11324 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 5 ms 10836 KB Output is correct
4 Correct 5 ms 10836 KB Output is correct
5 Correct 6 ms 10964 KB Output is correct
6 Correct 6 ms 11092 KB Output is correct
7 Correct 6 ms 11092 KB Output is correct
8 Correct 6 ms 11092 KB Output is correct
9 Correct 6 ms 11092 KB Output is correct
10 Correct 95 ms 31012 KB Output is correct
11 Correct 116 ms 35440 KB Output is correct
12 Correct 113 ms 34996 KB Output is correct
13 Correct 124 ms 36572 KB Output is correct
14 Correct 108 ms 38044 KB Output is correct
15 Correct 6 ms 11092 KB Output is correct
16 Correct 6 ms 11152 KB Output is correct
17 Correct 7 ms 11092 KB Output is correct
18 Correct 7 ms 11092 KB Output is correct
19 Correct 6 ms 11156 KB Output is correct
20 Correct 7 ms 11092 KB Output is correct
21 Correct 6 ms 11156 KB Output is correct
22 Correct 6 ms 11112 KB Output is correct
23 Correct 6 ms 11156 KB Output is correct
24 Correct 6 ms 11092 KB Output is correct
25 Correct 6 ms 11124 KB Output is correct
26 Correct 6 ms 11156 KB Output is correct
27 Correct 6 ms 11192 KB Output is correct
28 Correct 6 ms 11104 KB Output is correct
29 Correct 7 ms 11348 KB Output is correct
30 Correct 8 ms 11256 KB Output is correct
31 Correct 7 ms 11348 KB Output is correct
32 Correct 6 ms 11092 KB Output is correct
33 Correct 8 ms 11324 KB Output is correct
34 Correct 18 ms 14648 KB Output is correct
35 Correct 123 ms 38396 KB Output is correct
36 Correct 118 ms 38532 KB Output is correct
37 Correct 124 ms 38352 KB Output is correct
38 Correct 121 ms 37888 KB Output is correct
39 Correct 117 ms 37836 KB Output is correct
40 Correct 105 ms 35600 KB Output is correct
41 Correct 122 ms 38616 KB Output is correct
42 Correct 118 ms 38296 KB Output is correct
43 Correct 104 ms 40424 KB Output is correct
44 Correct 125 ms 38668 KB Output is correct
45 Correct 156 ms 47668 KB Output is correct
46 Correct 128 ms 38312 KB Output is correct
47 Correct 123 ms 38556 KB Output is correct
48 Correct 126 ms 41232 KB Output is correct
49 Correct 98 ms 42296 KB Output is correct
50 Correct 82 ms 35740 KB Output is correct
51 Correct 121 ms 42472 KB Output is correct
52 Correct 164 ms 51048 KB Output is correct
53 Correct 186 ms 53836 KB Output is correct
54 Correct 196 ms 58536 KB Output is correct
55 Correct 96 ms 40248 KB Output is correct
56 Correct 178 ms 54656 KB Output is correct

Subtask #5
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 5 ms 10836 KB Output is correct
4 Correct 6 ms 10964 KB Output is correct
5 Correct 6 ms 11092 KB Output is correct
6 Correct 6 ms 11092 KB Output is correct
7 Correct 6 ms 11092 KB Output is correct
8 Correct 6 ms 11092 KB Output is correct
9 Correct 95 ms 31012 KB Output is correct
10 Correct 116 ms 35440 KB Output is correct
11 Correct 113 ms 34996 KB Output is correct
12 Correct 124 ms 36572 KB Output is correct
13 Correct 108 ms 38044 KB Output is correct
14 Correct 104 ms 31140 KB Output is correct
15 Correct 166 ms 37512 KB Output is correct
16 Correct 161 ms 36860 KB Output is correct
17 Correct 169 ms 38304 KB Output is correct
18 Correct 149 ms 39820 KB Output is correct
19 Correct 302 ms 40336 KB Output is correct
20 Correct 294 ms 45612 KB Output is correct
21 Correct 308 ms 44912 KB Output is correct
22 Correct 286 ms 45308 KB Output is correct
23 Correct 299 ms 45284 KB Output is correct
24 Correct 289 ms 44064 KB Output is correct
25 Correct 280 ms 45032 KB Output is correct
26 Correct 287 ms 43804 KB Output is correct
27 Correct 6 ms 11092 KB Output is correct
28 Correct 6 ms 11152 KB Output is correct
29 Correct 7 ms 11092 KB Output is correct
30 Correct 7 ms 11092 KB Output is correct
31 Correct 6 ms 11156 KB Output is correct
32 Correct 7 ms 11092 KB Output is correct
33 Correct 6 ms 11156 KB Output is correct
34 Correct 6 ms 11112 KB Output is correct
35 Correct 6 ms 11156 KB Output is correct
36 Correct 18 ms 14648 KB Output is correct
37 Correct 123 ms 38396 KB Output is correct
38 Correct 118 ms 38532 KB Output is correct
39 Correct 124 ms 38352 KB Output is correct
40 Correct 121 ms 37888 KB Output is correct
41 Correct 117 ms 37836 KB Output is correct
42 Correct 105 ms 35600 KB Output is correct
43 Correct 122 ms 38616 KB Output is correct
44 Correct 118 ms 38296 KB Output is correct
45 Correct 104 ms 40424 KB Output is correct
46 Correct 125 ms 38668 KB Output is correct
47 Correct 26 ms 14796 KB Output is correct
48 Correct 261 ms 43268 KB Output is correct
49 Correct 252 ms 43312 KB Output is correct
50 Correct 240 ms 43132 KB Output is correct
51 Correct 256 ms 43064 KB Output is correct
52 Correct 228 ms 41448 KB Output is correct
53 Correct 198 ms 35136 KB Output is correct
54 Correct 287 ms 44080 KB Output is correct
55 Correct 287 ms 43252 KB Output is correct
56 Correct 321 ms 44776 KB Output is correct
57 Correct 252 ms 44208 KB Output is correct

Subtask #6
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 10836 KB Output is correct
2 Correct 5 ms 10836 KB Output is correct
3 Correct 5 ms 10836 KB Output is correct
4 Correct 5 ms 10836 KB Output is correct
5 Correct 6 ms 10964 KB Output is correct
6 Correct 6 ms 11092 KB Output is correct
7 Correct 6 ms 11092 KB Output is correct
8 Correct 6 ms 11092 KB Output is correct
9 Correct 6 ms 11092 KB Output is correct
10 Correct 95 ms 31012 KB Output is correct
11 Correct 116 ms 35440 KB Output is correct
12 Correct 113 ms 34996 KB Output is correct
13 Correct 124 ms 36572 KB Output is correct
14 Correct 108 ms 38044 KB Output is correct
15 Correct 104 ms 31140 KB Output is correct
16 Correct 166 ms 37512 KB Output is correct
17 Correct 161 ms 36860 KB Output is correct
18 Correct 169 ms 38304 KB Output is correct
19 Correct 149 ms 39820 KB Output is correct
20 Correct 302 ms 40336 KB Output is correct
21 Correct 294 ms 45612 KB Output is correct
22 Correct 308 ms 44912 KB Output is correct
23 Correct 286 ms 45308 KB Output is correct
24 Correct 299 ms 45284 KB Output is correct
25 Correct 289 ms 44064 KB Output is correct
26 Correct 280 ms 45032 KB Output is correct
27 Correct 287 ms 43804 KB Output is correct
28 Correct 6 ms 11092 KB Output is correct
29 Correct 6 ms 11152 KB Output is correct
30 Correct 7 ms 11092 KB Output is correct
31 Correct 7 ms 11092 KB Output is correct
32 Correct 6 ms 11156 KB Output is correct
33 Correct 7 ms 11092 KB Output is correct
34 Correct 6 ms 11156 KB Output is correct
35 Correct 6 ms 11112 KB Output is correct
36 Correct 6 ms 11156 KB Output is correct
37 Correct 18 ms 14648 KB Output is correct
38 Correct 123 ms 38396 KB Output is correct
39 Correct 118 ms 38532 KB Output is correct
40 Correct 124 ms 38352 KB Output is correct
41 Correct 121 ms 37888 KB Output is correct
42 Correct 117 ms 37836 KB Output is correct
43 Correct 105 ms 35600 KB Output is correct
44 Correct 122 ms 38616 KB Output is correct
45 Correct 118 ms 38296 KB Output is correct
46 Correct 104 ms 40424 KB Output is correct
47 Correct 125 ms 38668 KB Output is correct
48 Correct 26 ms 14796 KB Output is correct
49 Correct 261 ms 43268 KB Output is correct
50 Correct 252 ms 43312 KB Output is correct
51 Correct 240 ms 43132 KB Output is correct
52 Correct 256 ms 43064 KB Output is correct
53 Correct 228 ms 41448 KB Output is correct
54 Correct 198 ms 35136 KB Output is correct
55 Correct 287 ms 44080 KB Output is correct
56 Correct 287 ms 43252 KB Output is correct
57 Correct 321 ms 44776 KB Output is correct
58 Correct 252 ms 44208 KB Output is correct
59 Correct 96 ms 18404 KB Output is correct
60 Correct 246 ms 38728 KB Output is correct
61 Correct 248 ms 38056 KB Output is correct
62 Correct 275 ms 39704 KB Output is correct
63 Correct 381 ms 41208 KB Output is correct
64 Correct 6 ms 11092 KB Output is correct
65 Correct 6 ms 11124 KB Output is correct
66 Correct 6 ms 11156 KB Output is correct
67 Correct 6 ms 11192 KB Output is correct
68 Correct 6 ms 11104 KB Output is correct
69 Correct 7 ms 11348 KB Output is correct
70 Correct 8 ms 11256 KB Output is correct
71 Correct 7 ms 11348 KB Output is correct
72 Correct 6 ms 11092 KB Output is correct
73 Correct 8 ms 11324 KB Output is correct
74 Correct 156 ms 47668 KB Output is correct
75 Correct 128 ms 38312 KB Output is correct
76 Correct 123 ms 38556 KB Output is correct
77 Correct 126 ms 41232 KB Output is correct
78 Correct 98 ms 42296 KB Output is correct
79 Correct 82 ms 35740 KB Output is correct
80 Correct 121 ms 42472 KB Output is correct
81 Correct 164 ms 51048 KB Output is correct
82 Correct 186 ms 53836 KB Output is correct
83 Correct 196 ms 58536 KB Output is correct
84 Correct 96 ms 40248 KB Output is correct
85 Correct 178 ms 54656 KB Output is correct
86 Correct 89 ms 24760 KB Output is correct
87 Correct 249 ms 43260 KB Output is correct
88 Correct 258 ms 43240 KB Output is correct
89 Correct 292 ms 44624 KB Output is correct
90 Correct 212 ms 48228 KB Output is correct
91 Correct 221 ms 46192 KB Output is correct
92 Correct 306 ms 46584 KB Output is correct
93 Correct 292 ms 55172 KB Output is correct
94 Correct 378 ms 58316 KB Output is correct
95 Correct 342 ms 62576 KB Output is correct
96 Correct 340 ms 45040 KB Output is correct
97 Correct 340 ms 51952 KB Output is correct