Submission #561037

# Submission time Handle Problem Language Result Execution time Memory
561037 2022-05-12T07:58:46 Z fatemetmhr Friends (BOI17_friends) C++17
49 / 100
28 ms 5332 KB
//  ~Be name khoda~  //

#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb       push_back
#define mp       make_pair
#define all(x)   x.begin(), x.end()
#define fi       first
#define se       second

const int maxn  =  1e6   + 10;
const int maxn5 =  25e2  + 10;
const int maxnt =  1.2e6 + 10;
const int maxn3 =  1e3   + 10;
const int mod   =  1e9   +  7;
const ll  inf   =  1e18;

int grsz, mxed, pos = 0;
vector <int> verex, adj[maxn5], av[maxn5], tmp, esh;
int grsize, outedge, haveout[maxn5];
bool re, ntm[maxn5], ex[maxn5];
bool ex1[maxn5], ex2[maxn5];
bool ed[maxn5][maxn5], ab[maxn5];

inline void kill(){
    cout << "detention" << endl;
    assert(mxed <= 2);
    exit(0);
}

inline void solve(){
    if(grsize > grsz || outedge > mxed)
        return;
    if(re)
        return;
    int v = -1;
    for(auto u : verex) for(auto z : adj[u]) if(ntm[z]){
        v = z;
    }
    if(v == -1){
        //cout << "and now " << pos << ' ' << verex.size() << endl;
        av[pos] = verex;
        re = true;
        return;
    }

    //cout << verex.size() << ' ' << "this is " << v << endl;
    ntm[v] = false;
    ex[v] = true;
    verex.pb(v);
    grsize++;
    int remem = outedge;
    for(auto u : adj[v]) if(!ntm[u] && !ex[u])
        outedge++;
    solve();
    //cout << "finaly see " << v << ' ' << verex.size() << endl;
    if(re)
        return;
    verex.pop_back();
    ex[v] = false;
    grsize--;
    outedge = remem;
    for(auto u : adj[v]) if(!ntm[u] && ex[u])
        outedge++;
    solve();
    if(re)
        return;
    outedge = remem;
    ntm[v] = true;
    return;
}

inline void mostaghel_kon(int id1, int id2){
    if(av[id1].empty() || av[id2].empty())
        return;
    esh.clear();
    for(auto u : av[id1])
        ex1[u] = true;
    for(auto u : av[id2])
        ex2[u] = true;
    for(auto u : av[id2]) if(ex1[u]){
        esh.pb(u);
        ab[u] = true;
    }
    int ext1 = 0, ext2 = 0;
    for(auto u : esh) for(auto z : adj[u]) if(!ab[z]){
        if(ex1[z])
            ext1++;
        if(ex2[z])
            ext2++;
    }
    tmp.clear();
    int rpid = id1;
    if(ext1 + haveout[id1] <= mxed){
        for(auto u : av[id1]) if(!ab[u])
            tmp.pb(u);
    }
    else{
        rpid = id2;
        for(auto u : av[id2]) if(!ab[u])
            tmp.pb(u);
    }
    for(auto u : av[id1])
        ex1[u] = false;
    for(auto u : av[id2])
        ex2[u] = false;
    for(auto u : esh)
        ab[u] = false;
    av[rpid] = tmp;
    return;
}

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

    int n; cin >> n >> grsz >> mxed;

    for(int i = 0; i < n; i++){
        int l; cin >> l;
        while(l--){
            int a; cin >> a;
            ed[i][a] = true;
            adj[i].pb(a);
        }
    }
    for(int i = 0; i < n; i++) if(adj[i].size() > grsz + mxed)
        kill();
    for(int i = 0; i < n; i++) for(int j = i + 1; j < n; j++)
        if(ed[i][j] != ed[j][i])
            kill();

    for(int i = 0; i < n; i++){
        memset(ntm, true, sizeof ntm);
        ex[i] = true;
        ntm[i] = re = false;
        outedge = 0;
        grsize = 1;
        verex.clear();
        verex.pb(i);
        solve();
        if(!re)
            kill();
        haveout[pos] = outedge;
        pos++;
    }
    /*
    cout << "___" << endl;
    for(int i = 0; i < n; i++){
        cout << av[i].size() << ' ';
        for(auto u : av[i])
            cout << u << ' ';
        cout << endl;
    }
    //*/
    cout << "home" << endl;
    memset(ex, false, sizeof ex);
    for(int i = 0; i < n; i++) for(int j = i + 1; j < n; j++)
        mostaghel_kon(i, j);
    int cnt = 0;
    for(int i = 0; i < n; i++) if(av[i].size())
        cnt++;
    cout << cnt << endl;
    for(int i = 0; i < n; i++) if(av[i].size()){
        cout << av[i].size() << ' ';
        for(auto u : av[i])
            cout << u << ' ';
        cout << '\n';
    }
}

Compilation message

friends.cpp: In function 'int main()':
friends.cpp:131:49: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
  131 |     for(int i = 0; i < n; i++) if(adj[i].size() > grsz + mxed)
      |                                   ~~~~~~~~~~~~~~^~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Runtime error 1 ms 724 KB Execution killed with signal 6
7 Halted 0 ms 0 KB -
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 1052 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 2 ms 852 KB Output is correct
3 Correct 1 ms 724 KB Output is correct
4 Correct 1 ms 1052 KB Output is correct
5 Correct 1 ms 980 KB Output is correct
6 Correct 1 ms 980 KB Output is correct
7 Correct 1 ms 596 KB Output is correct
8 Correct 2 ms 980 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 15 ms 3040 KB Output is correct
11 Correct 21 ms 3540 KB Output is correct
12 Correct 24 ms 3524 KB Output is correct
13 Correct 28 ms 3540 KB Output is correct
14 Correct 5 ms 4896 KB Output is correct
15 Correct 6 ms 4936 KB Output is correct
16 Correct 3 ms 5332 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 468 KB Output is correct
4 Correct 1 ms 468 KB Output is correct
5 Correct 0 ms 468 KB Output is correct
6 Runtime error 1 ms 724 KB Execution killed with signal 6
7 Halted 0 ms 0 KB -