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Submission #400405

# Submission time Handle Problem Language Result Execution time Memory
400405 2021-05-07T23:39:26 Z Habitus Beautiful row (IZhO12_beauty) C++14
0 / 100
 3000 ms 178824 KB 
#include<bits/stdc++.h>
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define dec(x, y) fixed << setprecision((y)) << (x)
#define xx first
#define yy second
#define srt(v) sort((v).begin(), (v).end())
#define srtr(v) sort((v).rbegin(), (v).rend())
#define pb push_back
#define popb pop_back
#define sz(a) (int)(a).size()
#define len(a) (int)(a).length()
#define mp make_pair

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

int n, a[22];
ll dp[1100000][22];
bool mogu(int pr, int dr) {
    pr=a[pr]; dr=a[dr];
    if(__builtin_popcount(pr)==__builtin_popcount(dr)) return true;
    int tn1=0, tn2=0;
    int m1=pr, m2=dr;
    while(m1>0) {
        int cif=m1%3;
        m1/=3;
        if(cif==1) ++tn1;
    }
    while(m2>0) {
        int cif=m2%3;
        m2/=3;
        if(cif==1) ++tn2;
    }
    return (tn1==tn2);
}
int main() {
    ios;
    cin >> n;
    for(int i=0; i<n; ++i) cin >> a[i];
    for(int i=0; i<n; ++i) dp[0][i]=1;
    for(int mask=1; mask<(1<<n); ++mask) {
        for(int last=0; last<n; ++last) {
            if(((1<<last)&mask)==0) continue;
            if(__builtin_popcount(mask)==1) {
                dp[mask][last]=1;
                continue;
            }
            for(int j=0; j<n; ++j) {
                if(j==last || ((1<<j)&mask)==0) continue;
                if(mogu(j, last)) dp[mask][last]+=dp[mask^(1<<last)][j];
            }
        }
    }
    ll suma=0LL;
    for(int i=0; i<n; ++i) suma+=dp[(1<<n)-1][i];
    cout << suma;
    return 0;
}

Subtask #1
0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 320 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 336 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 2 ms 460 KB Output is correct
7 Correct 2 ms 448 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 2 ms 460 KB Output is correct
11 Correct 21 ms 3148 KB Output is correct
12 Correct 22 ms 3004 KB Output is correct
13 Correct 105 ms 11588 KB Output is correct
14 Correct 593 ms 45324 KB Output is correct
15 Correct 363 ms 45380 KB Output is correct
16 Correct 715 ms 45496 KB Output is correct
17 Correct 675 ms 45432 KB Output is correct
18 Correct 840 ms 45440 KB Output is correct
19 Execution timed out 3106 ms 178824 KB Time limit exceeded
20 Halted 0 ms 0 KB -