oj.uz

Submission #457996

# Submission time Handle Problem Language Result Execution time Memory
457996 2021-08-07T17:47:27 Z julian33 Political Development (BOI17_politicaldevelopment) C++14
39 / 100
 3000 ms 26524 KB 
#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
    cerr<<vars<<" = ";
    string delim="";
    (...,(cerr<<delim<<values,delim=", "));
    cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif

#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);} 
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

const int mxN=5e4+5; //make sure this is right
const int mod=1e9+7;

/*
transform the directed graph to a bidirectional graph
an edge exists between a and b iff there is an edge a->b and b->a
binary search for the best k
start from the lowest node, only traverse to greater nodes that have degree >= k-1
*/

set<int> graph[mxN];
vector<int> cur;
int n,k;

bool dfs(int &s){
    if(sz(cur)==s)
        return 1;
    int at=cur.back();
    for(int i:graph[at]){
        if(i<=at || sz(graph[i])<s-1)
            continue;
        int bad=0;
        for(int &j:cur){
            if(!graph[i].count(j)){
                bad=1;
                break;
            }
        }
        if(bad)
            continue;
        cur.pb(i);
        if(dfs(s))
            return 1;
        cur.pop_back();
    }
    return 0;
}

bool check(int &s){
    for(int i=0;i<n;i++){
        if(sz(graph[i])<s-1)
            continue;
        cur={i};
        if(dfs(s))
            return 1;
    }
    return 0;
}

int main(){
    cin.sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    #ifdef LOCAL
        freopen("input.txt","r",stdin);
        freopen("output.txt","w",stdout);
    #endif

    cin>>n>>k;
    for(int i=0;i<n;i++){
        int d; cin>>d;
        while(d--){
            int x; cin>>x;
            graph[i].insert(x);
        }
    }
    for(int i=0;i<n;i++){
        vector<int> rem;
        for(int j:graph[i]){
            if(!graph[j].count(i))
                rem.pb(j);
        }
        for(int &j:rem)
            graph[i].erase(j);
    }
    int l=1; int r=k;
    int ans=1;
    while(l<=r){
        int mid=(l+r)>>1;
        if(check(mid)){
            ans=mid; l=mid+1;
        } else{
            r=mid-1;
        }
    }
    cout<<ans<<"\n";
}

Subtask #1
4.0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 4 ms 2636 KB Output is correct
3 Correct 6 ms 3196 KB Output is correct
4 Correct 5 ms 3148 KB Output is correct
5 Correct 5 ms 3172 KB Output is correct
6 Correct 5 ms 3188 KB Output is correct
7 Correct 4 ms 3148 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 4 ms 2636 KB Output is correct
3 Correct 6 ms 3196 KB Output is correct
4 Correct 5 ms 3148 KB Output is correct
5 Correct 5 ms 3172 KB Output is correct
6 Correct 5 ms 3188 KB Output is correct
7 Correct 4 ms 3148 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 5 ms 3148 KB Output is correct
12 Correct 5 ms 3148 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 6 ms 3148 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 5 ms 3184 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 5 ms 3148 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 4 ms 2888 KB Output is correct
21 Correct 3 ms 2892 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 5 ms 3324 KB Output is correct
24 Correct 2 ms 2636 KB Output is correct
25 Correct 5 ms 3276 KB Output is correct
26 Correct 5 ms 3148 KB Output is correct
27 Correct 5 ms 3148 KB Output is correct
28 Correct 5 ms 3148 KB Output is correct
29 Correct 6 ms 3148 KB Output is correct
30 Correct 25 ms 3364 KB Output is correct
31 Correct 6 ms 3312 KB Output is correct
32 Correct 20 ms 3368 KB Output is correct
33 Correct 6 ms 3316 KB Output is correct
34 Correct 6 ms 3336 KB Output is correct
35 Correct 5 ms 2936 KB Output is correct
36 Correct 4 ms 2892 KB Output is correct
37 Correct 4 ms 2892 KB Output is correct
38 Correct 4 ms 2816 KB Output is correct
39 Correct 4 ms 2892 KB Output is correct
40 Correct 7 ms 3660 KB Output is correct
41 Correct 4 ms 2808 KB Output is correct
42 Correct 7 ms 3704 KB Output is correct
43 Correct 7 ms 3700 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 3 ms 2816 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2668 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 465 ms 26440 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 334 ms 26384 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Correct 497 ms 26428 KB Output is correct
16 Correct 341 ms 26428 KB Output is correct
17 Correct 468 ms 26524 KB Output is correct
18 Correct 458 ms 26428 KB Output is correct

Subtask #4
0 / 38.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 4 ms 2636 KB Output is correct
3 Correct 6 ms 3196 KB Output is correct
4 Correct 5 ms 3148 KB Output is correct
5 Correct 5 ms 3172 KB Output is correct
6 Correct 5 ms 3188 KB Output is correct
7 Correct 4 ms 3148 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 5 ms 3148 KB Output is correct
12 Correct 5 ms 3148 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 6 ms 3148 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 5 ms 3184 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 5 ms 3148 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 4 ms 2888 KB Output is correct
21 Correct 3 ms 2892 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 5 ms 3324 KB Output is correct
24 Correct 2 ms 2636 KB Output is correct
25 Correct 5 ms 3276 KB Output is correct
26 Correct 5 ms 3148 KB Output is correct
27 Correct 5 ms 3148 KB Output is correct
28 Correct 5 ms 3148 KB Output is correct
29 Correct 6 ms 3148 KB Output is correct
30 Correct 25 ms 3364 KB Output is correct
31 Correct 6 ms 3312 KB Output is correct
32 Correct 20 ms 3368 KB Output is correct
33 Correct 6 ms 3316 KB Output is correct
34 Correct 6 ms 3336 KB Output is correct
35 Correct 5 ms 2936 KB Output is correct
36 Correct 4 ms 2892 KB Output is correct
37 Correct 4 ms 2892 KB Output is correct
38 Correct 4 ms 2816 KB Output is correct
39 Correct 4 ms 2892 KB Output is correct
40 Correct 7 ms 3660 KB Output is correct
41 Correct 4 ms 2808 KB Output is correct
42 Correct 7 ms 3704 KB Output is correct
43 Correct 7 ms 3700 KB Output is correct
44 Correct 12 ms 4684 KB Output is correct
45 Correct 2 ms 2636 KB Output is correct
46 Correct 7 ms 3660 KB Output is correct
47 Correct 22 ms 4740 KB Output is correct
48 Correct 9 ms 3696 KB Output is correct
49 Correct 21 ms 4684 KB Output is correct
50 Correct 25 ms 4708 KB Output is correct
51 Correct 30 ms 6808 KB Output is correct
52 Correct 6 ms 3192 KB Output is correct
53 Execution timed out 3068 ms 7264 KB Time limit exceeded
54 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 4 ms 2636 KB Output is correct
3 Correct 6 ms 3196 KB Output is correct
4 Correct 5 ms 3148 KB Output is correct
5 Correct 5 ms 3172 KB Output is correct
6 Correct 5 ms 3188 KB Output is correct
7 Correct 4 ms 3148 KB Output is correct
8 Correct 2 ms 2636 KB Output is correct
9 Correct 2 ms 2636 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 5 ms 3148 KB Output is correct
12 Correct 5 ms 3148 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 6 ms 3148 KB Output is correct
15 Correct 2 ms 2636 KB Output is correct
16 Correct 5 ms 3184 KB Output is correct
17 Correct 2 ms 2636 KB Output is correct
18 Correct 5 ms 3148 KB Output is correct
19 Correct 2 ms 2688 KB Output is correct
20 Correct 4 ms 2888 KB Output is correct
21 Correct 3 ms 2892 KB Output is correct
22 Correct 2 ms 2636 KB Output is correct
23 Correct 5 ms 3324 KB Output is correct
24 Correct 2 ms 2636 KB Output is correct
25 Correct 5 ms 3276 KB Output is correct
26 Correct 5 ms 3148 KB Output is correct
27 Correct 5 ms 3148 KB Output is correct
28 Correct 5 ms 3148 KB Output is correct
29 Correct 6 ms 3148 KB Output is correct
30 Correct 25 ms 3364 KB Output is correct
31 Correct 6 ms 3312 KB Output is correct
32 Correct 20 ms 3368 KB Output is correct
33 Correct 6 ms 3316 KB Output is correct
34 Correct 6 ms 3336 KB Output is correct
35 Correct 5 ms 2936 KB Output is correct
36 Correct 4 ms 2892 KB Output is correct
37 Correct 4 ms 2892 KB Output is correct
38 Correct 4 ms 2816 KB Output is correct
39 Correct 4 ms 2892 KB Output is correct
40 Correct 7 ms 3660 KB Output is correct
41 Correct 4 ms 2808 KB Output is correct
42 Correct 7 ms 3704 KB Output is correct
43 Correct 7 ms 3700 KB Output is correct
44 Correct 2 ms 2636 KB Output is correct
45 Correct 157 ms 18532 KB Output is correct
46 Correct 67 ms 10532 KB Output is correct
47 Correct 198 ms 18604 KB Output is correct
48 Correct 117 ms 18440 KB Output is correct
49 Correct 37 ms 7916 KB Output is correct
50 Execution timed out 3052 ms 23768 KB Time limit exceeded
51 Halted 0 ms 0 KB -