oj.uz

Submission #789058

# Submission time Handle Problem Language Result Execution time Memory
789058 2023-07-20T23:46:11 Z Username4132 Povjerenstvo (COI22_povjerenstvo) C++14
100 / 100
 402 ms 101108 KB 
#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
#define forn(i, n) for(int i=0; i<(int)n; ++i)
#define PB push_back

const int MAXN = 500010;
int n, m, cn;
bool vis[MAXN], ans[MAXN], del[MAXN];
vector<int> g[MAXN], gi[MAXN], order, toDel;

void dfs1(int v){
    vis[v]=true;
    for(int to:gi[v]) if(!vis[to]) dfs1(to);
    order.PB(v);
}

void dfs2(int v, bool flag){
    del[v]=true;
    if(flag){
        ans[v]=true;
        for(int to:gi[v]) toDel.PB(to);
    }
    for(int to:g[v]) if(!del[to]) dfs2(to, !flag);
}

int main(){
    scanf("%d %d", &n, &m);
    forn(i, m){
        int a, b; scanf("%d %d", &a, &b); --a, --b;
        g[a].PB(b), gi[b].PB(a);
    }
    forn(i, n) if(!vis[i]) dfs1(i);
    reverse(order.begin(), order.end());
    for(int el:order) if(!del[el]){
        dfs2(el, true);
        for(int de:toDel) del[de]=true;
        toDel.clear();
    }
    forn(i, n) cn+=ans[i];
    printf("%d\n", cn);
    forn(i, n) if(ans[i]) printf("%d ", i+1);
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:29:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
Main.cpp:31:24: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   31 |         int a, b; scanf("%d %d", &a, &b); --a, --b;
      |                   ~~~~~^~~~~~~~~~~~~~~~~

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 60184 KB Output is correct
2 Correct 157 ms 59524 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 55 ms 30360 KB Output is correct
5 Correct 100 ms 45376 KB Output is correct
6 Correct 142 ms 47232 KB Output is correct
7 Correct 120 ms 47672 KB Output is correct
8 Correct 151 ms 46884 KB Output is correct
9 Correct 317 ms 53416 KB Output is correct
10 Correct 222 ms 51216 KB Output is correct
11 Correct 289 ms 50676 KB Output is correct
12 Correct 294 ms 46352 KB Output is correct
13 Correct 212 ms 46784 KB Output is correct
14 Correct 209 ms 46912 KB Output is correct
15 Correct 207 ms 47068 KB Output is correct
16 Correct 191 ms 47136 KB Output is correct
17 Correct 58 ms 27728 KB Output is correct
18 Correct 82 ms 29968 KB Output is correct

Subtask #2
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 155 ms 60108 KB Output is correct
2 Correct 146 ms 47668 KB Output is correct
3 Correct 112 ms 46552 KB Output is correct
4 Correct 285 ms 50136 KB Output is correct
5 Correct 402 ms 50008 KB Output is correct
6 Correct 245 ms 53944 KB Output is correct
7 Correct 231 ms 54260 KB Output is correct
8 Correct 210 ms 54108 KB Output is correct
9 Correct 195 ms 54100 KB Output is correct
10 Correct 59 ms 28824 KB Output is correct
11 Correct 45 ms 29012 KB Output is correct
12 Correct 47 ms 29032 KB Output is correct
13 Correct 188 ms 100904 KB Output is correct
14 Correct 164 ms 69652 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 24148 KB Output is correct
2 Correct 13 ms 24216 KB Output is correct
3 Correct 13 ms 24092 KB Output is correct
4 Correct 12 ms 24100 KB Output is correct
5 Correct 12 ms 24020 KB Output is correct
6 Correct 13 ms 24020 KB Output is correct
7 Correct 14 ms 24020 KB Output is correct
8 Correct 13 ms 24020 KB Output is correct
9 Correct 12 ms 23764 KB Output is correct
10 Correct 12 ms 23764 KB Output is correct
11 Correct 11 ms 23820 KB Output is correct
12 Correct 13 ms 24532 KB Output is correct
13 Correct 13 ms 24148 KB Output is correct
14 Correct 12 ms 23764 KB Output is correct
15 Correct 13 ms 24060 KB Output is correct
16 Correct 13 ms 24068 KB Output is correct
17 Correct 12 ms 24040 KB Output is correct
18 Correct 11 ms 23784 KB Output is correct
19 Correct 11 ms 23892 KB Output is correct

Subtask #4
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 160 ms 60184 KB Output is correct
2 Correct 157 ms 59524 KB Output is correct
3 Correct 12 ms 23792 KB Output is correct
4 Correct 55 ms 30360 KB Output is correct
5 Correct 100 ms 45376 KB Output is correct
6 Correct 142 ms 47232 KB Output is correct
7 Correct 120 ms 47672 KB Output is correct
8 Correct 151 ms 46884 KB Output is correct
9 Correct 317 ms 53416 KB Output is correct
10 Correct 222 ms 51216 KB Output is correct
11 Correct 289 ms 50676 KB Output is correct
12 Correct 294 ms 46352 KB Output is correct
13 Correct 212 ms 46784 KB Output is correct
14 Correct 209 ms 46912 KB Output is correct
15 Correct 207 ms 47068 KB Output is correct
16 Correct 191 ms 47136 KB Output is correct
17 Correct 58 ms 27728 KB Output is correct
18 Correct 82 ms 29968 KB Output is correct
19 Correct 155 ms 60108 KB Output is correct
20 Correct 146 ms 47668 KB Output is correct
21 Correct 112 ms 46552 KB Output is correct
22 Correct 285 ms 50136 KB Output is correct
23 Correct 402 ms 50008 KB Output is correct
24 Correct 245 ms 53944 KB Output is correct
25 Correct 231 ms 54260 KB Output is correct
26 Correct 210 ms 54108 KB Output is correct
27 Correct 195 ms 54100 KB Output is correct
28 Correct 59 ms 28824 KB Output is correct
29 Correct 45 ms 29012 KB Output is correct
30 Correct 47 ms 29032 KB Output is correct
31 Correct 188 ms 100904 KB Output is correct
32 Correct 164 ms 69652 KB Output is correct
33 Correct 13 ms 24148 KB Output is correct
34 Correct 13 ms 24216 KB Output is correct
35 Correct 13 ms 24092 KB Output is correct
36 Correct 12 ms 24100 KB Output is correct
37 Correct 12 ms 24020 KB Output is correct
38 Correct 13 ms 24020 KB Output is correct
39 Correct 14 ms 24020 KB Output is correct
40 Correct 13 ms 24020 KB Output is correct
41 Correct 12 ms 23764 KB Output is correct
42 Correct 12 ms 23764 KB Output is correct
43 Correct 11 ms 23820 KB Output is correct
44 Correct 13 ms 24532 KB Output is correct
45 Correct 13 ms 24148 KB Output is correct
46 Correct 12 ms 23764 KB Output is correct
47 Correct 13 ms 24060 KB Output is correct
48 Correct 13 ms 24068 KB Output is correct
49 Correct 12 ms 24040 KB Output is correct
50 Correct 11 ms 23784 KB Output is correct
51 Correct 11 ms 23892 KB Output is correct
52 Correct 152 ms 64996 KB Output is correct
53 Correct 143 ms 50936 KB Output is correct
54 Correct 110 ms 49788 KB Output is correct
55 Correct 268 ms 55148 KB Output is correct
56 Correct 360 ms 55584 KB Output is correct
57 Correct 241 ms 54076 KB Output is correct
58 Correct 222 ms 54124 KB Output is correct
59 Correct 208 ms 54132 KB Output is correct
60 Correct 73 ms 29256 KB Output is correct
61 Correct 51 ms 29024 KB Output is correct
62 Correct 48 ms 29056 KB Output is correct
63 Correct 193 ms 101108 KB Output is correct
64 Correct 164 ms 68312 KB Output is correct
65 Correct 51 ms 29520 KB Output is correct
66 Correct 304 ms 52260 KB Output is correct
67 Correct 222 ms 52508 KB Output is correct
68 Correct 212 ms 52296 KB Output is correct
69 Correct 51 ms 28868 KB Output is correct
70 Correct 127 ms 39728 KB Output is correct