Submission #339110

#	Time	Username	Problem	Language	Result	Execution time	Memory
339110		fixikmila	Beautiful row (IZhO12_beauty)	C++14	100 / 100	777 ms	164544 KiB

beauty

#include <bits/stdc++.h>
using namespace std;
#define MOD 1000000007
typedef long long ll;
typedef pair<ll,ll>pll;
typedef long double ld;
ll bin_pow(ll a,ll b){
    if(b==0)return 1;
    if(b%2==0){
        ll t=bin_pow(a,b/2);
        return t*t%MOD;
    }
    else return a*bin_pow(a,b-1)%MOD;
}
vector<ll>graph[20];
bool tr(ll x,ll y){
    string s="",s1="";
    while(x){
        s+=x%3+'0';
        x/=3;
    }
    while(y){
        s1+=y%3+'0';
        y/=3;
    }
    x=y=0;
    for(auto u : s){
        if(u=='1')x++;
    }
    for(auto u : s1){
        if(u=='1')y++;
    }
    return x==y;
}
ll dp[1<<20][20];
int main()
{
    //freopen("b.in","r",stdin);
    //freopen("b.out","w",stdout);
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
    cin>>n;
    vector<ll>a(n);
    map<ll,ll>mp;
    for(int i=0;i<n;i++)cin>>a[i],mp[a[i]]=x,x++;
    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            if((__builtin_popcount(a[i])==__builtin_popcount(a[j]))||tr(a[i],a[j])){
                    //cout<<i<<" "<<j<<endl;
                graph[i].push_back(j);
                graph[j].push_back(i);
            }
        }
    }
    for(int i=1;i<(1<<n);i++){
        for(int j=0;j<n;j++){
            if((i&(1<<j))!=0){
                if(__builtin_popcount(i)==1)dp[i][j]=1;
                else{
                    for(auto z : graph[j]){
                        if((i&(1<<z))!=0){
                            dp[i][j]+=dp[(i^(1<<j))][z];
                        }
                    }
                }
            }
            else dp[i][j]=0;
        }
    }

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

Compilation message (stderr)

beauty.cpp: In function 'int main()':
beauty.cpp:42:8: warning: unused variable 't' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |        ^
beauty.cpp:42:14: warning: unused variable 'm' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |              ^
beauty.cpp:42:16: warning: unused variable 'k' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                ^
beauty.cpp:42:20: warning: unused variable 'sum' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                    ^~~
beauty.cpp:42:26: warning: unused variable 'l' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                          ^
beauty.cpp:42:30: warning: unused variable 'r' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                              ^
beauty.cpp:42:38: warning: unused variable 'y' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                      ^
beauty.cpp:42:42: warning: unused variable 'z' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                          ^
beauty.cpp:42:52: warning: unused variable 'mn' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                    ^~
beauty.cpp:42:65: warning: unused variable 'mx' [-Wunused-variable]
   42 |     ll t=1,n,m,k=0,sum=0,l=0,r=0,x=0,y=0,z=0,ans=0,mn=LLONG_MAX,mx=LLONG_MIN;
      |                                                                 ^~

• Subtask 1: 100 / 100