oj.uz

Submission #245574

# Submission time Handle Problem Language Result Execution time Memory
245574 2020-07-06T19:10:03 Z aloo123 Beautiful row (IZhO12_beauty) C++14
0 / 100
 3000 ms 45688 KB 
#include <algorithm>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <ratio>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#include <climits>
#include <ext/pb_ds/assoc_container.hpp>
// #include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>
#define ll long long
#define ld long double
#define mp make_pair
#define pb push_back
#define in insert
#define vll vector<ll>
#define endl "\n"
#define pll pair<ll,ll>
#define f first
#define s second
#define int ll
#define sz(x) (ll)x.size()
#define all(x) (x.begin(),x.end())
using namespace std;
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> os;
 
 
const ll INF = 1e7;
const ll N =(1e6+5); // TODO : change value as per problem
// const ll MOD = 1e9+9;
const ll SUM = 20005;
ll a[25];
ll dp[1ll<<22][22];
ll popcount2(ll x){
    ll co = 0;
    while(x){
        if(x%3 == 1) co+=1;
        x /= 3;
    }
    return co;
}

bool good(ll i,ll j){
    ll x = a[i];
    ll y = a[j];
    if(__builtin_popcount(x) == __builtin_popcount(y)) return true;
    if(popcount2(x) == popcount2(y))return true;
    return false;
}

void solve(){
    ll n;
    cin >> n;
    for(int i =1;i<=n;i++) cin >> a[i-1];
    for(ll mask = 0;mask<(1ll<<n);mask++){
        if(__builtin_popcount(mask) == 1){
            ll opt;
            for(int i = 0;i<n;i++){
                if((mask&(1ll<<i))){
                    opt =i;
                    break;
                }
            }
            dp[mask][opt] = 1;
        }
    }
    for(ll mask = 0;mask<(1ll<<n);mask++){
        if(__builtin_popcount(mask) <= 1) continue;
        for(int i = 0;i<n;i++){
            for(int j = 0;j<n;j++){
                if(j != i && good(j,i)){
                    // cout << a[j] << " " << a[i] << endl;
                    dp[mask][i] += dp[mask^(1ll<<i)][j];
                }
            }
        }
    }
    ll ans= 0;

    for(int i = 0;i<n;i++) ans += dp[(1ll<<n) - 1][i];
    cout<<ans;
}

signed main(){

    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    

 
     ll tt=1;   
     // cin >> tt;
    while(tt--){    
        solve();
    }    
}

Compilation message

beauty.cpp: In function 'void solve()':
beauty.cpp:89:27: warning: 'opt' may be used uninitialized in this function [-Wmaybe-uninitialized]
             dp[mask][opt] = 1;
             ~~~~~~~~~~~~~~^~~

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 7 ms 512 KB Output is correct
7 Correct 8 ms 512 KB Output is correct
8 Correct 6 ms 560 KB Output is correct
9 Correct 7 ms 512 KB Output is correct
10 Correct 11 ms 512 KB Output is correct
11 Correct 58 ms 3192 KB Output is correct
12 Correct 63 ms 3192 KB Output is correct
13 Correct 280 ms 11640 KB Output is correct
14 Correct 1968 ms 45620 KB Output is correct
15 Correct 658 ms 45560 KB Output is correct
16 Correct 2560 ms 45560 KB Output is correct
17 Correct 2268 ms 45688 KB Output is correct
18 Execution timed out 3036 ms 43604 KB Time limit exceeded
19 Halted 0 ms 0 KB -