oj.uz

Submission #782874

# Submission time Handle Problem Language Result Execution time Memory
782874 2023-07-14T10:39:54 Z Sami_Massah Subtree (INOI20_subtree) C++11
38 / 100
 553 ms 1048576 KB 
#include <bits/stdc++.h>
using namespace std;


const int maxn = 1e5 + 12, mod = 1e9 + 7;
long long n, m, pd[maxn], h[maxn], dp[maxn], sum[maxn];
vector <int> conn[maxn], nums;
bitset <maxn> marked, in_nums;
void dfs(int u, int p = -1){

    marked[u] = 1;
    int me = -1;
    for(int v: conn[u])
        if(!marked[v]){
            pd[v] = u;
            h[v] = h[u] + 1;
            dfs(v, u);
        }
        else if(h[u] < h[v])
            me = v;
   // cout << u << ' ' << me << endl;
    if(me == -1){
        dp[u] = 1;
        for(int v: conn[u])
            if(h[u] < h[v]){
            //    cout << u << '-' << v << endl;
                dp[u] = (dp[u] * (dp[v] + 1)) % mod;
    }
        dp[u] %= mod;
        //cout << u << "->" << dp[u] << endl;
    }
    else{
        nums.clear();
        in_nums = 0;
        while(h[u] <= h[me] && me){
            nums.push_back(me);
            in_nums[me] = 1;
            me = pd[me];
        }
        for(int j = 0; j <= nums.size(); j++)
            sum[j] = 0;
        long long res = 1;
        for(int j = 0; j < nums.size(); j++){

            int nu = nums[j];
            for(int v: conn[nu])
                if(h[nu] < h[v] && !in_nums[v]){
                    res = res * (dp[v] + 1) % mod;
                    res %= mod;
                }
            sum[j] = (j == 0? 1: sum[j - 1]);
            sum[j] += res;
            sum[j] %= mod;
          //  cout << nu << ' ' << sum[j] << endl;

        }
       // cout << dp[2] << endl;
        res = 1;
        for(int j = nums.size() - 1; j >= 1; j--){
            int nu = nums[j];
            for(int v: conn[nu])
                if(h[nu] < h[v] && !in_nums[v]){
                    res = res * (dp[v] + 1) % mod;
                }
            res %= mod;
            if(j - 2 >= 0)
                dp[u] += res % mod * (sum[j - 2] % mod) % mod;
            dp[u] %= mod;
        }
        //cout << dp[2] << endl;
        dp[u] += res;
        dp[u] %= mod;
    }


}
int main(){
    cin >> n >> m;
    for(int i = 0; i < m; i++){
        int a, b;
        cin >> a >> b;
        conn[a].push_back(b);
        conn[b].push_back(a);
    }
   // cout << endl;
    dfs(1);
    long long ans = 0;
   // cout << endl;
    for(int i = 1; i <= n; i++){
        ans += dp[i];
        ans %= mod;
       // cout << i << ' ' << dp[i] << endl;
        }
    cout << ans << endl;









}
/*    cin >> n >> m;
    for(int i = 0; i < m; i++){
        int a, b;
        cin >> a >> b;
        e[a][b] = 1;
        e[b][a] = 1;
    }
    int ans = 0;
    cout << endl;
    for(int i = 0; i < (1 << n); i++){
        for(int j = 0; j < n; j++)
            if((i >> j) & 1)
                p.push_back(j + 1);
        int num = 0;
        for(int j = 0; j < p.size(); j++)
            for(int c = j; c < p.size(); c++)
                if(e[p[j]][p[c]])
                    num += 1;
        if(num == p.size() - 1){
            if(p[0] == 1){
                for(int j: p)
                    cout << j << ' ';
                cout << endl;
            }
            ans += 1;

        }
        p.clear();

    }
    cout << ans << endl;
*/

Compilation message

Main.cpp: In function 'void dfs(int, int)':
Main.cpp:40:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |         for(int j = 0; j <= nums.size(); j++)
      |                        ~~^~~~~~~~~~~~~~
Main.cpp:43:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for(int j = 0; j < nums.size(); j++){
      |                        ~~^~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2772 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2664 KB Output is correct
7 Correct 2 ms 2656 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2772 KB Output is correct
10 Correct 2 ms 2792 KB Output is correct
11 Correct 1 ms 2772 KB Output is correct
12 Correct 2 ms 2900 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 1 ms 2660 KB Output is correct
15 Correct 2 ms 2772 KB Output is correct
16 Correct 2 ms 2772 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 1 ms 2772 KB Output is correct
19 Correct 1 ms 2772 KB Output is correct
20 Correct 1 ms 2772 KB Output is correct
21 Correct 1 ms 2668 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 2 ms 2644 KB Output is correct
24 Correct 1 ms 2644 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 1 ms 2664 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 1 ms 2792 KB Output is correct
30 Correct 1 ms 2796 KB Output is correct
31 Correct 2 ms 2772 KB Output is correct
32 Correct 2 ms 2772 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2772 KB Output is correct
35 Correct 2 ms 2792 KB Output is correct
36 Correct 1 ms 2772 KB Output is correct
37 Correct 1 ms 2772 KB Output is correct
38 Correct 1 ms 2772 KB Output is correct
39 Correct 1 ms 2900 KB Output is correct
40 Correct 1 ms 2900 KB Output is correct
41 Correct 2 ms 2900 KB Output is correct
42 Correct 2 ms 2772 KB Output is correct
43 Correct 2 ms 2792 KB Output is correct
44 Correct 2 ms 2788 KB Output is correct
45 Correct 2 ms 2792 KB Output is correct
46 Correct 1 ms 2788 KB Output is correct
47 Correct 2 ms 2772 KB Output is correct
48 Correct 2 ms 2900 KB Output is correct
49 Correct 2 ms 2900 KB Output is correct
50 Correct 2 ms 2920 KB Output is correct
51 Correct 2 ms 2900 KB Output is correct

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2772 KB Output is correct
2 Correct 6 ms 3668 KB Output is correct
3 Correct 57 ms 9772 KB Output is correct
4 Correct 56 ms 9708 KB Output is correct
5 Correct 56 ms 9752 KB Output is correct
6 Correct 56 ms 9676 KB Output is correct
7 Correct 553 ms 902964 KB Output is correct
8 Correct 275 ms 573388 KB Output is correct
9 Correct 269 ms 570188 KB Output is correct
10 Correct 55 ms 10448 KB Output is correct
11 Correct 55 ms 9592 KB Output is correct
12 Correct 57 ms 9504 KB Output is correct
13 Correct 65 ms 14824 KB Output is correct
14 Correct 201 ms 380068 KB Output is correct
15 Correct 510 ms 1035220 KB Output is correct
16 Runtime error 414 ms 1048576 KB Execution killed with signal 9
17 Halted 0 ms 0 KB -

Subtask #3
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2772 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2664 KB Output is correct
7 Correct 2 ms 2656 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2772 KB Output is correct
10 Correct 2 ms 2792 KB Output is correct
11 Correct 1 ms 2772 KB Output is correct
12 Correct 2 ms 2900 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 1 ms 2660 KB Output is correct
15 Correct 2 ms 2772 KB Output is correct
16 Correct 2 ms 2772 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 1 ms 2772 KB Output is correct
19 Correct 1 ms 2772 KB Output is correct
20 Correct 1 ms 2772 KB Output is correct
21 Correct 1 ms 2668 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 2 ms 2644 KB Output is correct
24 Correct 1 ms 2644 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 1 ms 2664 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 1 ms 2792 KB Output is correct
30 Correct 1 ms 2796 KB Output is correct
31 Correct 2 ms 2772 KB Output is correct
32 Correct 2 ms 2772 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2772 KB Output is correct
35 Correct 2 ms 2792 KB Output is correct
36 Correct 1 ms 2772 KB Output is correct
37 Correct 1 ms 2772 KB Output is correct
38 Correct 1 ms 2772 KB Output is correct
39 Correct 1 ms 2900 KB Output is correct
40 Correct 1 ms 2900 KB Output is correct
41 Correct 2 ms 2900 KB Output is correct
42 Correct 2 ms 2772 KB Output is correct
43 Correct 2 ms 2792 KB Output is correct
44 Correct 2 ms 2788 KB Output is correct
45 Correct 2 ms 2792 KB Output is correct
46 Correct 1 ms 2788 KB Output is correct
47 Correct 2 ms 2772 KB Output is correct
48 Correct 2 ms 2900 KB Output is correct
49 Correct 2 ms 2900 KB Output is correct
50 Correct 2 ms 2920 KB Output is correct
51 Correct 2 ms 2900 KB Output is correct
52 Correct 4 ms 3284 KB Output is correct
53 Correct 4 ms 3284 KB Output is correct
54 Correct 4 ms 3284 KB Output is correct
55 Correct 5 ms 5588 KB Output is correct
56 Correct 27 ms 51424 KB Output is correct
57 Correct 4 ms 3028 KB Output is correct
58 Correct 4 ms 3028 KB Output is correct
59 Correct 13 ms 22140 KB Output is correct
60 Correct 4 ms 3412 KB Output is correct
61 Correct 5 ms 5076 KB Output is correct
62 Correct 6 ms 5000 KB Output is correct
63 Correct 4 ms 3028 KB Output is correct
64 Correct 3 ms 3028 KB Output is correct
65 Correct 4 ms 3284 KB Output is correct
66 Correct 5 ms 3284 KB Output is correct
67 Correct 5 ms 5332 KB Output is correct
68 Correct 22 ms 38900 KB Output is correct
69 Correct 4 ms 3412 KB Output is correct
70 Correct 4 ms 3412 KB Output is correct
71 Correct 5 ms 5076 KB Output is correct
72 Correct 5 ms 5204 KB Output is correct
73 Correct 3 ms 3028 KB Output is correct
74 Correct 5 ms 4180 KB Output is correct
75 Correct 16 ms 28128 KB Output is correct
76 Correct 5 ms 4692 KB Output is correct
77 Correct 25 ms 44920 KB Output is correct
78 Correct 8 ms 11648 KB Output is correct
79 Correct 21 ms 40608 KB Output is correct
80 Correct 6 ms 5844 KB Output is correct
81 Correct 6 ms 8340 KB Output is correct
82 Correct 5 ms 7892 KB Output is correct
83 Correct 5 ms 5972 KB Output is correct

Subtask #4
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2772 KB Output is correct
4 Correct 1 ms 2644 KB Output is correct
5 Correct 1 ms 2644 KB Output is correct
6 Correct 1 ms 2664 KB Output is correct
7 Correct 2 ms 2656 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 1 ms 2772 KB Output is correct
10 Correct 2 ms 2792 KB Output is correct
11 Correct 1 ms 2772 KB Output is correct
12 Correct 2 ms 2900 KB Output is correct
13 Correct 2 ms 2772 KB Output is correct
14 Correct 1 ms 2660 KB Output is correct
15 Correct 2 ms 2772 KB Output is correct
16 Correct 2 ms 2772 KB Output is correct
17 Correct 1 ms 2644 KB Output is correct
18 Correct 1 ms 2772 KB Output is correct
19 Correct 1 ms 2772 KB Output is correct
20 Correct 1 ms 2772 KB Output is correct
21 Correct 1 ms 2668 KB Output is correct
22 Correct 2 ms 2644 KB Output is correct
23 Correct 2 ms 2644 KB Output is correct
24 Correct 1 ms 2644 KB Output is correct
25 Correct 1 ms 2644 KB Output is correct
26 Correct 1 ms 2644 KB Output is correct
27 Correct 1 ms 2664 KB Output is correct
28 Correct 2 ms 2644 KB Output is correct
29 Correct 1 ms 2792 KB Output is correct
30 Correct 1 ms 2796 KB Output is correct
31 Correct 2 ms 2772 KB Output is correct
32 Correct 2 ms 2772 KB Output is correct
33 Correct 1 ms 2644 KB Output is correct
34 Correct 1 ms 2772 KB Output is correct
35 Correct 2 ms 2792 KB Output is correct
36 Correct 1 ms 2772 KB Output is correct
37 Correct 1 ms 2772 KB Output is correct
38 Correct 1 ms 2772 KB Output is correct
39 Correct 1 ms 2900 KB Output is correct
40 Correct 1 ms 2900 KB Output is correct
41 Correct 2 ms 2900 KB Output is correct
42 Correct 2 ms 2772 KB Output is correct
43 Correct 2 ms 2792 KB Output is correct
44 Correct 2 ms 2788 KB Output is correct
45 Correct 2 ms 2792 KB Output is correct
46 Correct 1 ms 2788 KB Output is correct
47 Correct 2 ms 2772 KB Output is correct
48 Correct 2 ms 2900 KB Output is correct
49 Correct 2 ms 2900 KB Output is correct
50 Correct 2 ms 2920 KB Output is correct
51 Correct 2 ms 2900 KB Output is correct
52 Correct 2 ms 2772 KB Output is correct
53 Correct 6 ms 3668 KB Output is correct
54 Correct 57 ms 9772 KB Output is correct
55 Correct 56 ms 9708 KB Output is correct
56 Correct 56 ms 9752 KB Output is correct
57 Correct 56 ms 9676 KB Output is correct
58 Correct 553 ms 902964 KB Output is correct
59 Correct 275 ms 573388 KB Output is correct
60 Correct 269 ms 570188 KB Output is correct
61 Correct 55 ms 10448 KB Output is correct
62 Correct 55 ms 9592 KB Output is correct
63 Correct 57 ms 9504 KB Output is correct
64 Correct 65 ms 14824 KB Output is correct
65 Correct 201 ms 380068 KB Output is correct
66 Correct 510 ms 1035220 KB Output is correct
67 Runtime error 414 ms 1048576 KB Execution killed with signal 9
68 Halted 0 ms 0 KB -