oj.uz

Submission #1003298

# Submission time Handle Problem Language Result Execution time Memory
1003298 2024-06-20T08:42:17 Z vjudge1 Subtree (INOI20_subtree) C++17
50 / 100
 2000 ms 30976 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;
        assert(dp[to]!=0);
      }
    }
  }
  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:76:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |   for(int i = 0;i<cycles[c].size();i++) {
      |                 ~^~~~~~~~~~~~~~~~~
Main.cpp:83:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |       if(sz == cycles[c].size())break;
      |          ~~~^~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 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 7516 KB Output is correct
6 Correct 3 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 7420 KB Output is correct
10 Correct 3 ms 7596 KB Output is correct
11 Correct 3 ms 7632 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 3 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 4 ms 7516 KB Output is correct
18 Correct 4 ms 7636 KB Output is correct
19 Correct 4 ms 7516 KB Output is correct
20 Correct 3 ms 7516 KB Output is correct
21 Correct 3 ms 7512 KB Output is correct
22 Correct 3 ms 7560 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 3 ms 7632 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7516 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 3 ms 7516 KB Output is correct
31 Correct 3 ms 7516 KB Output is correct
32 Correct 3 ms 7516 KB Output is correct
33 Correct 3 ms 7516 KB Output is correct
34 Correct 3 ms 7516 KB Output is correct
35 Correct 3 ms 7600 KB Output is correct
36 Correct 3 ms 7516 KB Output is correct
37 Correct 3 ms 7592 KB Output is correct
38 Correct 3 ms 7516 KB Output is correct
39 Correct 3 ms 7512 KB Output is correct
40 Correct 4 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7516 KB Output is correct
43 Correct 3 ms 7516 KB Output is correct
44 Correct 3 ms 7512 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 3 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 3 ms 7516 KB Output is correct
50 Correct 3 ms 7512 KB Output is correct
51 Correct 3 ms 7516 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7512 KB Output is correct
2 Correct 7 ms 9112 KB Output is correct
3 Correct 56 ms 22620 KB Output is correct
4 Correct 54 ms 22540 KB Output is correct
5 Correct 52 ms 22608 KB Output is correct
6 Correct 50 ms 22528 KB Output is correct
7 Correct 63 ms 29188 KB Output is correct
8 Correct 60 ms 26640 KB Output is correct
9 Correct 58 ms 26628 KB Output is correct
10 Correct 45 ms 23300 KB Output is correct
11 Correct 43 ms 23008 KB Output is correct
12 Correct 57 ms 22532 KB Output is correct
13 Correct 61 ms 22468 KB Output is correct
14 Correct 51 ms 25664 KB Output is correct
15 Correct 65 ms 30212 KB Output is correct
16 Correct 62 ms 30976 KB Output is correct
17 Correct 63 ms 22276 KB Output is correct
18 Correct 59 ms 22532 KB Output is correct
19 Correct 70 ms 22528 KB Output is correct
20 Correct 49 ms 22596 KB Output is correct
21 Correct 43 ms 22796 KB Output is correct
22 Correct 41 ms 22788 KB Output is correct

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 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 7516 KB Output is correct
6 Correct 3 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 7420 KB Output is correct
10 Correct 3 ms 7596 KB Output is correct
11 Correct 3 ms 7632 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 3 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 4 ms 7516 KB Output is correct
18 Correct 4 ms 7636 KB Output is correct
19 Correct 4 ms 7516 KB Output is correct
20 Correct 3 ms 7516 KB Output is correct
21 Correct 3 ms 7512 KB Output is correct
22 Correct 3 ms 7560 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 3 ms 7632 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7516 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 3 ms 7516 KB Output is correct
31 Correct 3 ms 7516 KB Output is correct
32 Correct 3 ms 7516 KB Output is correct
33 Correct 3 ms 7516 KB Output is correct
34 Correct 3 ms 7516 KB Output is correct
35 Correct 3 ms 7600 KB Output is correct
36 Correct 3 ms 7516 KB Output is correct
37 Correct 3 ms 7592 KB Output is correct
38 Correct 3 ms 7516 KB Output is correct
39 Correct 3 ms 7512 KB Output is correct
40 Correct 4 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7516 KB Output is correct
43 Correct 3 ms 7516 KB Output is correct
44 Correct 3 ms 7512 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 3 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 3 ms 7516 KB Output is correct
50 Correct 3 ms 7512 KB Output is correct
51 Correct 3 ms 7516 KB Output is correct
52 Correct 4 ms 8280 KB Output is correct
53 Correct 4 ms 8284 KB Output is correct
54 Correct 5 ms 8348 KB Output is correct
55 Correct 4 ms 8540 KB Output is correct
56 Correct 6 ms 8540 KB Output is correct
57 Correct 4 ms 8284 KB Output is correct
58 Correct 4 ms 8284 KB Output is correct
59 Correct 4 ms 8476 KB Output is correct
60 Correct 4 ms 8284 KB Output is correct
61 Correct 5 ms 8284 KB Output is correct
62 Correct 5 ms 8300 KB Output is correct
63 Correct 4 ms 8284 KB Output is correct
64 Correct 5 ms 8284 KB Output is correct
65 Correct 4 ms 8284 KB Output is correct
66 Correct 9 ms 8288 KB Output is correct
67 Correct 5 ms 8540 KB Output is correct
68 Correct 7 ms 8540 KB Output is correct
69 Correct 4 ms 8284 KB Output is correct
70 Correct 4 ms 8284 KB Output is correct
71 Correct 6 ms 8280 KB Output is correct
72 Correct 5 ms 8284 KB Output is correct
73 Correct 4 ms 8432 KB Output is correct
74 Correct 4 ms 8028 KB Output is correct
75 Correct 4 ms 8332 KB Output is correct
76 Correct 5 ms 8284 KB Output is correct
77 Correct 6 ms 8540 KB Output is correct
78 Correct 15 ms 8280 KB Output is correct
79 Correct 17 ms 8280 KB Output is correct
80 Correct 7 ms 8028 KB Output is correct
81 Correct 7 ms 8388 KB Output is correct
82 Correct 7 ms 8160 KB Output is correct
83 Correct 8 ms 8180 KB Output is correct

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 7516 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 7516 KB Output is correct
6 Correct 3 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 7420 KB Output is correct
10 Correct 3 ms 7596 KB Output is correct
11 Correct 3 ms 7632 KB Output is correct
12 Correct 3 ms 7516 KB Output is correct
13 Correct 3 ms 7516 KB Output is correct
14 Correct 3 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 4 ms 7516 KB Output is correct
18 Correct 4 ms 7636 KB Output is correct
19 Correct 4 ms 7516 KB Output is correct
20 Correct 3 ms 7516 KB Output is correct
21 Correct 3 ms 7512 KB Output is correct
22 Correct 3 ms 7560 KB Output is correct
23 Correct 3 ms 7516 KB Output is correct
24 Correct 3 ms 7632 KB Output is correct
25 Correct 3 ms 7516 KB Output is correct
26 Correct 3 ms 7516 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 3 ms 7516 KB Output is correct
31 Correct 3 ms 7516 KB Output is correct
32 Correct 3 ms 7516 KB Output is correct
33 Correct 3 ms 7516 KB Output is correct
34 Correct 3 ms 7516 KB Output is correct
35 Correct 3 ms 7600 KB Output is correct
36 Correct 3 ms 7516 KB Output is correct
37 Correct 3 ms 7592 KB Output is correct
38 Correct 3 ms 7516 KB Output is correct
39 Correct 3 ms 7512 KB Output is correct
40 Correct 4 ms 7516 KB Output is correct
41 Correct 3 ms 7516 KB Output is correct
42 Correct 3 ms 7516 KB Output is correct
43 Correct 3 ms 7516 KB Output is correct
44 Correct 3 ms 7512 KB Output is correct
45 Correct 2 ms 7516 KB Output is correct
46 Correct 3 ms 7516 KB Output is correct
47 Correct 3 ms 7516 KB Output is correct
48 Correct 3 ms 7516 KB Output is correct
49 Correct 3 ms 7516 KB Output is correct
50 Correct 3 ms 7512 KB Output is correct
51 Correct 3 ms 7516 KB Output is correct
52 Correct 3 ms 7512 KB Output is correct
53 Correct 7 ms 9112 KB Output is correct
54 Correct 56 ms 22620 KB Output is correct
55 Correct 54 ms 22540 KB Output is correct
56 Correct 52 ms 22608 KB Output is correct
57 Correct 50 ms 22528 KB Output is correct
58 Correct 63 ms 29188 KB Output is correct
59 Correct 60 ms 26640 KB Output is correct
60 Correct 58 ms 26628 KB Output is correct
61 Correct 45 ms 23300 KB Output is correct
62 Correct 43 ms 23008 KB Output is correct
63 Correct 57 ms 22532 KB Output is correct
64 Correct 61 ms 22468 KB Output is correct
65 Correct 51 ms 25664 KB Output is correct
66 Correct 65 ms 30212 KB Output is correct
67 Correct 62 ms 30976 KB Output is correct
68 Correct 63 ms 22276 KB Output is correct
69 Correct 59 ms 22532 KB Output is correct
70 Correct 70 ms 22528 KB Output is correct
71 Correct 49 ms 22596 KB Output is correct
72 Correct 43 ms 22796 KB Output is correct
73 Correct 41 ms 22788 KB Output is correct
74 Correct 4 ms 8280 KB Output is correct
75 Correct 4 ms 8284 KB Output is correct
76 Correct 5 ms 8348 KB Output is correct
77 Correct 4 ms 8540 KB Output is correct
78 Correct 6 ms 8540 KB Output is correct
79 Correct 4 ms 8284 KB Output is correct
80 Correct 4 ms 8284 KB Output is correct
81 Correct 4 ms 8476 KB Output is correct
82 Correct 4 ms 8284 KB Output is correct
83 Correct 5 ms 8284 KB Output is correct
84 Correct 5 ms 8300 KB Output is correct
85 Correct 4 ms 8284 KB Output is correct
86 Correct 5 ms 8284 KB Output is correct
87 Correct 4 ms 8284 KB Output is correct
88 Correct 9 ms 8288 KB Output is correct
89 Correct 5 ms 8540 KB Output is correct
90 Correct 7 ms 8540 KB Output is correct
91 Correct 4 ms 8284 KB Output is correct
92 Correct 4 ms 8284 KB Output is correct
93 Correct 6 ms 8280 KB Output is correct
94 Correct 5 ms 8284 KB Output is correct
95 Correct 4 ms 8432 KB Output is correct
96 Correct 4 ms 8028 KB Output is correct
97 Correct 4 ms 8332 KB Output is correct
98 Correct 5 ms 8284 KB Output is correct
99 Correct 6 ms 8540 KB Output is correct
100 Correct 15 ms 8280 KB Output is correct
101 Correct 17 ms 8280 KB Output is correct
102 Correct 7 ms 8028 KB Output is correct
103 Correct 7 ms 8388 KB Output is correct
104 Correct 7 ms 8160 KB Output is correct
105 Correct 8 ms 8180 KB Output is correct
106 Correct 62 ms 23208 KB Output is correct
107 Correct 60 ms 23044 KB Output is correct
108 Correct 69 ms 22784 KB Output is correct
109 Correct 82 ms 22784 KB Output is correct
110 Correct 54 ms 23604 KB Output is correct
111 Correct 45 ms 24620 KB Output is correct
112 Correct 77 ms 26632 KB Output is correct
113 Correct 64 ms 20744 KB Output is correct
114 Correct 63 ms 22216 KB Output is correct
115 Correct 38 ms 23100 KB Output is correct
116 Correct 73 ms 27140 KB Output is correct
117 Correct 62 ms 26376 KB Output is correct
118 Correct 40 ms 24388 KB Output is correct
119 Correct 71 ms 21000 KB Output is correct
120 Correct 64 ms 21000 KB Output is correct
121 Correct 61 ms 21344 KB Output is correct
122 Correct 91 ms 21588 KB Output is correct
123 Correct 52 ms 23312 KB Output is correct
124 Correct 39 ms 22916 KB Output is correct
125 Correct 40 ms 22844 KB Output is correct
126 Correct 67 ms 23040 KB Output is correct
127 Correct 63 ms 23052 KB Output is correct
128 Correct 60 ms 22788 KB Output is correct
129 Correct 60 ms 22784 KB Output is correct
130 Correct 46 ms 23556 KB Output is correct
131 Correct 58 ms 24576 KB Output is correct
132 Correct 73 ms 26632 KB Output is correct
133 Correct 67 ms 20744 KB Output is correct
134 Correct 72 ms 22240 KB Output is correct
135 Correct 41 ms 23108 KB Output is correct
136 Correct 67 ms 25608 KB Output is correct
137 Correct 74 ms 26236 KB Output is correct
138 Correct 52 ms 24384 KB Output is correct
139 Correct 71 ms 20972 KB Output is correct
140 Correct 66 ms 21000 KB Output is correct
141 Correct 70 ms 21168 KB Output is correct
142 Correct 66 ms 21508 KB Output is correct
143 Correct 43 ms 23300 KB Output is correct
144 Correct 54 ms 23048 KB Output is correct
145 Correct 43 ms 22844 KB Output is correct
146 Correct 58 ms 19368 KB Output is correct
147 Correct 92 ms 18136 KB Output is correct
148 Correct 533 ms 18240 KB Output is correct
149 Execution timed out 2062 ms 19260 KB Time limit exceeded
150 Halted 0 ms 0 KB -