oj.uz

Submission #1003274

# Submission time Handle Problem Language Result Execution time Memory
1003274 2024-06-20T08:26:23 Z vjudge1 Subtree (INOI20_subtree) C++17
50 / 100
 2000 ms 32492 KB 
#include <bits/stdc++.h>
using namespace std;
const int N=1e5+10;
vector<int> g[N];
vector<int> bridges[N];
vector<int> notBridges[N];
int add[N], depth[N];
bool vis[N];
vector<vector<int>> cycles;
int getCycle[N];
void dfsAdd(int at, int p) {
  vis[at]=1;
  for(int to:g[at]) {
    if(to==p)continue;
    if(vis[to] == 1) 
    {
      if(depth[at] > depth[to]) {
        add[at]++;
        add[to]--;
        notBridges[to].push_back(at);
        notBridges[at].push_back(to);
      }
      continue;
    }
    depth[to]=depth[at]+1;
    dfsAdd(to, at);
  }
}
void dfsGetBridges(int at, int p) {
  vis[at]=1;
  for(int to:g[at]) {
    if(vis[to])continue;
    dfsGetBridges(to, at);
    add[at]+=add[to];
  }
  if(p==0)return;
  if(add[at] == 0) {
    bridges[at].push_back(p);
    bridges[p].push_back(at);
  }
  else {
    notBridges[at].push_back(p);
    notBridges[p].push_back(at);
  }
}
vector<int> tempcycle;
void dfsGetCycles(int at) {
  tempcycle.push_back(at);
  vis[at]=1;
  for(int to:notBridges[at]) {
    if(vis[to])continue;
    dfsGetCycles(to);
  }
}
long long dp[N], tmpdp[N];
const long long mod = 1e9+7;
long long ans=0;
void dfsCalc(int c, int cc) {
  vis[c]=1;
  for(int at:cycles[c]) {
    dp[at]=1;
    for(int to:g[at]) {
      if(!vis[getCycle[to]]) {
        dfsCalc(getCycle[to], to);
        dp[at] = (dp[at]*(dp[to]+1))%mod;
      }
    }
  }
  if(cycles[c].size()==1){
    ans+=dp[cycles[c][0]];
    ans%=mod;
    return;
  }
  for(int i = 0;i<cycles[c].size();i++) {
    long long prod = 1;
    int k =i;
    int idx=-1, cnt=0;
    int sz=0;
    while(1) {
      sz++;
      if(sz == cycles[c].size())break;
      if(cycles[c][k] == cc) {
        idx=cnt;
      }
      prod = (prod*dp[cycles[c][k]])%mod;
      ans=(ans+prod)%mod;
      if(idx != -1) {
        tmpdp[cc]=(tmpdp[cc]+prod)%mod;
      }
      k=(k+1)%cycles[c].size();
    }
  }
  for(int i:cycles[c]) {
    dp[i]=tmpdp[i];
  }
}
int main () {
  cin.tie(0)->sync_with_stdio(0);
  int n, m;
  cin >> n >> m;
  for(int i = 0;i<m;i++) {
    int u, v;
    cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  dfsAdd(1, 0);
  memset(vis, 0, sizeof vis);
  dfsGetBridges(1, 0);
  memset(vis, 0, sizeof vis);
  for(int i = 1;i<=n;i++) {
    if(vis[i] == 0) {
      dfsGetCycles(i);
      for(int c:tempcycle) {
        getCycle[c] = cycles.size();
      }
      cycles.push_back(tempcycle);
      tempcycle.clear();
    }
  }
  memset(vis, 0, sizeof vis);
  dfsCalc(0, -1);
  cout << ans%mod << "\n";
}

Compilation message

Main.cpp: In function 'void dfsCalc(int, int)':
Main.cpp:74:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |   for(int i = 0;i<cycles[c].size();i++) {
      |                 ~^~~~~~~~~~~~~~~~~
Main.cpp:81:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |       if(sz == cycles[c].size())break;
      |          ~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7512 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 3 ms 7492 KB Output is correct
6 Correct 2 ms 7516 KB Output is correct
7 Correct 2 ms 7516 KB Output is correct
8 Correct 2 ms 7516 KB Output is correct
9 Correct 3 ms 7668 KB Output is correct
10 Correct 2 ms 7516 KB Output is correct
11 Correct 2 ms 7600 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 2 ms 7516 KB Output is correct
15 Correct 3 ms 7516 KB Output is correct
16 Correct 3 ms 7516 KB Output is correct
17 Correct 2 ms 7516 KB Output is correct
18 Correct 2 ms 7516 KB Output is correct
19 Correct 3 ms 7516 KB Output is correct
20 Correct 2 ms 7516 KB Output is correct
21 Correct 2 ms 7516 KB Output is correct
22 Correct 3 ms 7516 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 4 ms 7516 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7480 KB Output is correct
27 Correct 3 ms 7516 KB Output is correct
28 Correct 3 ms 7516 KB Output is correct
29 Correct 2 ms 7516 KB Output is correct
30 Correct 2 ms 7520 KB Output is correct
31 Correct 2 ms 7516 KB Output is correct
32 Correct 2 ms 7516 KB Output is correct
33 Correct 4 ms 7516 KB Output is correct
34 Correct 3 ms 7512 KB Output is correct
35 Correct 2 ms 7516 KB Output is correct
36 Correct 3 ms 7520 KB Output is correct
37 Correct 3 ms 7512 KB Output is correct
38 Correct 3 ms 7520 KB Output is correct
39 Correct 3 ms 7516 KB Output is correct
40 Correct 2 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7632 KB Output is correct
43 Correct 3 ms 7524 KB Output is correct
44 Correct 3 ms 7516 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 2 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 2 ms 7516 KB Output is correct
50 Correct 3 ms 7516 KB Output is correct
51 Correct 3 ms 7624 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 KB Output is correct
2 Correct 6 ms 9080 KB Output is correct
3 Correct 55 ms 22600 KB Output is correct
4 Correct 59 ms 22532 KB Output is correct
5 Correct 55 ms 22528 KB Output is correct
6 Correct 54 ms 22664 KB Output is correct
7 Correct 68 ms 30208 KB Output is correct
8 Correct 63 ms 27396 KB Output is correct
9 Correct 60 ms 27412 KB Output is correct
10 Correct 47 ms 23308 KB Output is correct
11 Correct 44 ms 22852 KB Output is correct
12 Correct 62 ms 22396 KB Output is correct
13 Correct 60 ms 22460 KB Output is correct
14 Correct 49 ms 26172 KB Output is correct
15 Correct 67 ms 31488 KB Output is correct
16 Correct 70 ms 32492 KB Output is correct
17 Correct 72 ms 22500 KB Output is correct
18 Correct 70 ms 22528 KB Output is correct
19 Correct 61 ms 22540 KB Output is correct
20 Correct 41 ms 22588 KB Output is correct
21 Correct 44 ms 22796 KB Output is correct
22 Correct 47 ms 22856 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7512 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 3 ms 7492 KB Output is correct
6 Correct 2 ms 7516 KB Output is correct
7 Correct 2 ms 7516 KB Output is correct
8 Correct 2 ms 7516 KB Output is correct
9 Correct 3 ms 7668 KB Output is correct
10 Correct 2 ms 7516 KB Output is correct
11 Correct 2 ms 7600 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 2 ms 7516 KB Output is correct
15 Correct 3 ms 7516 KB Output is correct
16 Correct 3 ms 7516 KB Output is correct
17 Correct 2 ms 7516 KB Output is correct
18 Correct 2 ms 7516 KB Output is correct
19 Correct 3 ms 7516 KB Output is correct
20 Correct 2 ms 7516 KB Output is correct
21 Correct 2 ms 7516 KB Output is correct
22 Correct 3 ms 7516 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 4 ms 7516 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7480 KB Output is correct
27 Correct 3 ms 7516 KB Output is correct
28 Correct 3 ms 7516 KB Output is correct
29 Correct 2 ms 7516 KB Output is correct
30 Correct 2 ms 7520 KB Output is correct
31 Correct 2 ms 7516 KB Output is correct
32 Correct 2 ms 7516 KB Output is correct
33 Correct 4 ms 7516 KB Output is correct
34 Correct 3 ms 7512 KB Output is correct
35 Correct 2 ms 7516 KB Output is correct
36 Correct 3 ms 7520 KB Output is correct
37 Correct 3 ms 7512 KB Output is correct
38 Correct 3 ms 7520 KB Output is correct
39 Correct 3 ms 7516 KB Output is correct
40 Correct 2 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7632 KB Output is correct
43 Correct 3 ms 7524 KB Output is correct
44 Correct 3 ms 7516 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 2 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 2 ms 7516 KB Output is correct
50 Correct 3 ms 7516 KB Output is correct
51 Correct 3 ms 7624 KB Output is correct
52 Correct 5 ms 8280 KB Output is correct
53 Correct 5 ms 8284 KB Output is correct
54 Correct 5 ms 8308 KB Output is correct
55 Correct 5 ms 8540 KB Output is correct
56 Correct 7 ms 8560 KB Output is correct
57 Correct 6 ms 8292 KB Output is correct
58 Correct 5 ms 8284 KB Output is correct
59 Correct 6 ms 8420 KB Output is correct
60 Correct 6 ms 8284 KB Output is correct
61 Correct 5 ms 8172 KB Output is correct
62 Correct 5 ms 8284 KB Output is correct
63 Correct 5 ms 8284 KB Output is correct
64 Correct 5 ms 8284 KB Output is correct
65 Correct 5 ms 8284 KB Output is correct
66 Correct 5 ms 8296 KB Output is correct
67 Correct 4 ms 8540 KB Output is correct
68 Correct 5 ms 8540 KB Output is correct
69 Correct 5 ms 8296 KB Output is correct
70 Correct 4 ms 8284 KB Output is correct
71 Correct 5 ms 8284 KB Output is correct
72 Correct 5 ms 8284 KB Output is correct
73 Correct 4 ms 8284 KB Output is correct
74 Correct 5 ms 8176 KB Output is correct
75 Correct 6 ms 8300 KB Output is correct
76 Correct 6 ms 8284 KB Output is correct
77 Correct 6 ms 8536 KB Output is correct
78 Correct 15 ms 8284 KB Output is correct
79 Correct 17 ms 8280 KB Output is correct
80 Correct 7 ms 8024 KB Output is correct
81 Correct 7 ms 8388 KB Output is correct
82 Correct 7 ms 8280 KB Output is correct
83 Correct 6 ms 8352 KB Output is correct

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7512 KB Output is correct
2 Correct 2 ms 7516 KB Output is correct
3 Correct 3 ms 7516 KB Output is correct
4 Correct 2 ms 7516 KB Output is correct
5 Correct 3 ms 7492 KB Output is correct
6 Correct 2 ms 7516 KB Output is correct
7 Correct 2 ms 7516 KB Output is correct
8 Correct 2 ms 7516 KB Output is correct
9 Correct 3 ms 7668 KB Output is correct
10 Correct 2 ms 7516 KB Output is correct
11 Correct 2 ms 7600 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 2 ms 7516 KB Output is correct
15 Correct 3 ms 7516 KB Output is correct
16 Correct 3 ms 7516 KB Output is correct
17 Correct 2 ms 7516 KB Output is correct
18 Correct 2 ms 7516 KB Output is correct
19 Correct 3 ms 7516 KB Output is correct
20 Correct 2 ms 7516 KB Output is correct
21 Correct 2 ms 7516 KB Output is correct
22 Correct 3 ms 7516 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 4 ms 7516 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7480 KB Output is correct
27 Correct 3 ms 7516 KB Output is correct
28 Correct 3 ms 7516 KB Output is correct
29 Correct 2 ms 7516 KB Output is correct
30 Correct 2 ms 7520 KB Output is correct
31 Correct 2 ms 7516 KB Output is correct
32 Correct 2 ms 7516 KB Output is correct
33 Correct 4 ms 7516 KB Output is correct
34 Correct 3 ms 7512 KB Output is correct
35 Correct 2 ms 7516 KB Output is correct
36 Correct 3 ms 7520 KB Output is correct
37 Correct 3 ms 7512 KB Output is correct
38 Correct 3 ms 7520 KB Output is correct
39 Correct 3 ms 7516 KB Output is correct
40 Correct 2 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7632 KB Output is correct
43 Correct 3 ms 7524 KB Output is correct
44 Correct 3 ms 7516 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 2 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 2 ms 7516 KB Output is correct
50 Correct 3 ms 7516 KB Output is correct
51 Correct 3 ms 7624 KB Output is correct
52 Correct 3 ms 7516 KB Output is correct
53 Correct 6 ms 9080 KB Output is correct
54 Correct 55 ms 22600 KB Output is correct
55 Correct 59 ms 22532 KB Output is correct
56 Correct 55 ms 22528 KB Output is correct
57 Correct 54 ms 22664 KB Output is correct
58 Correct 68 ms 30208 KB Output is correct
59 Correct 63 ms 27396 KB Output is correct
60 Correct 60 ms 27412 KB Output is correct
61 Correct 47 ms 23308 KB Output is correct
62 Correct 44 ms 22852 KB Output is correct
63 Correct 62 ms 22396 KB Output is correct
64 Correct 60 ms 22460 KB Output is correct
65 Correct 49 ms 26172 KB Output is correct
66 Correct 67 ms 31488 KB Output is correct
67 Correct 70 ms 32492 KB Output is correct
68 Correct 72 ms 22500 KB Output is correct
69 Correct 70 ms 22528 KB Output is correct
70 Correct 61 ms 22540 KB Output is correct
71 Correct 41 ms 22588 KB Output is correct
72 Correct 44 ms 22796 KB Output is correct
73 Correct 47 ms 22856 KB Output is correct
74 Correct 5 ms 8280 KB Output is correct
75 Correct 5 ms 8284 KB Output is correct
76 Correct 5 ms 8308 KB Output is correct
77 Correct 5 ms 8540 KB Output is correct
78 Correct 7 ms 8560 KB Output is correct
79 Correct 6 ms 8292 KB Output is correct
80 Correct 5 ms 8284 KB Output is correct
81 Correct 6 ms 8420 KB Output is correct
82 Correct 6 ms 8284 KB Output is correct
83 Correct 5 ms 8172 KB Output is correct
84 Correct 5 ms 8284 KB Output is correct
85 Correct 5 ms 8284 KB Output is correct
86 Correct 5 ms 8284 KB Output is correct
87 Correct 5 ms 8284 KB Output is correct
88 Correct 5 ms 8296 KB Output is correct
89 Correct 4 ms 8540 KB Output is correct
90 Correct 5 ms 8540 KB Output is correct
91 Correct 5 ms 8296 KB Output is correct
92 Correct 4 ms 8284 KB Output is correct
93 Correct 5 ms 8284 KB Output is correct
94 Correct 5 ms 8284 KB Output is correct
95 Correct 4 ms 8284 KB Output is correct
96 Correct 5 ms 8176 KB Output is correct
97 Correct 6 ms 8300 KB Output is correct
98 Correct 6 ms 8284 KB Output is correct
99 Correct 6 ms 8536 KB Output is correct
100 Correct 15 ms 8284 KB Output is correct
101 Correct 17 ms 8280 KB Output is correct
102 Correct 7 ms 8024 KB Output is correct
103 Correct 7 ms 8388 KB Output is correct
104 Correct 7 ms 8280 KB Output is correct
105 Correct 6 ms 8352 KB Output is correct
106 Correct 56 ms 23044 KB Output is correct
107 Correct 58 ms 23040 KB Output is correct
108 Correct 54 ms 22784 KB Output is correct
109 Correct 61 ms 22788 KB Output is correct
110 Correct 40 ms 23552 KB Output is correct
111 Correct 44 ms 24576 KB Output is correct
112 Correct 65 ms 26632 KB Output is correct
113 Correct 73 ms 20740 KB Output is correct
114 Correct 64 ms 22272 KB Output is correct
115 Correct 36 ms 23012 KB Output is correct
116 Correct 63 ms 26884 KB Output is correct
117 Correct 68 ms 26384 KB Output is correct
118 Correct 46 ms 24388 KB Output is correct
119 Correct 59 ms 21016 KB Output is correct
120 Correct 60 ms 20996 KB Output is correct
121 Correct 59 ms 21252 KB Output is correct
122 Correct 66 ms 21348 KB Output is correct
123 Correct 43 ms 23316 KB Output is correct
124 Correct 49 ms 22836 KB Output is correct
125 Correct 43 ms 22848 KB Output is correct
126 Correct 53 ms 23040 KB Output is correct
127 Correct 53 ms 23040 KB Output is correct
128 Correct 50 ms 22808 KB Output is correct
129 Correct 54 ms 22784 KB Output is correct
130 Correct 48 ms 23556 KB Output is correct
131 Correct 49 ms 24544 KB Output is correct
132 Correct 65 ms 26628 KB Output is correct
133 Correct 58 ms 20744 KB Output is correct
134 Correct 56 ms 22140 KB Output is correct
135 Correct 37 ms 23100 KB Output is correct
136 Correct 61 ms 25604 KB Output is correct
137 Correct 77 ms 26120 KB Output is correct
138 Correct 42 ms 24384 KB Output is correct
139 Correct 70 ms 21048 KB Output is correct
140 Correct 74 ms 20996 KB Output is correct
141 Correct 64 ms 21252 KB Output is correct
142 Correct 63 ms 21508 KB Output is correct
143 Correct 42 ms 23296 KB Output is correct
144 Correct 48 ms 23036 KB Output is correct
145 Correct 40 ms 22848 KB Output is correct
146 Correct 59 ms 19340 KB Output is correct
147 Correct 86 ms 18256 KB Output is correct
148 Correct 497 ms 18260 KB Output is correct
149 Execution timed out 2066 ms 19008 KB Time limit exceeded
150 Halted 0 ms 0 KB -