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bitmask_DP.cpp
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bitmask_DP.cpp
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#include<bits/stdc++.h>
#define pf printf
#define sc scanf
#define PI 2*acos(0.0)
#define fast ios_base::sync_with_stdio(false);cin.tie(0); cout.tie(0)
#define mem(a,b) memset(a, b, sizeof(a) )
#define gcd(a,b) __gcd(a,b)
#define lcm(a,b) (a*(b/gcd(a,b)))
#define MAX 1234567899
#define mod 1000000007
#define all(v) (v).begin(),(v).end()
#define vSort(v) sort(all(v))
#define maxSort(v) sort(all(v),greater<int>())
#define Unique(v) v.erase(unique(all(v)),v.end())
#define sqr(x) ((x)*(x))
#define qube(x) ((x)*(x)*(x))
#define deci(n) cout<<fixed<<setprecision(n)
#define sci(n) sc("%d",&(n))
#define scii(x,y) sc("%d %d",&(x),&(y))
#define scl(x) sc("%lld",&(x))
#define scll(x,y) sc("%lld %lld",&(x),&(y))
#define vi vector<int>
#define hi pf(" HI \n")
#define pp pair<int,int>
#define pb(x) push_back(x)
#define mp(x,y) make_pair(x,y)
#define F first
#define S second
#define check(n,pos) (n & (1<<(pos)))
#define biton(n,pos) (n | (1<<(pos)))
#define bitoff(n,pos) (n & ~(1<<(pos)))
typedef long long int lli;
typedef unsigned long long int ulli;
int dx4[] = { 0 , 0 , -1 , 1 } ;
int dy4[] = { -1 , 1 , 0 , 0 } ;
bool valid( int r , int c , int x , int y ){
if( x >= 1 && x <= r && y >= 1 && y <= c ) return 1 ; return 0 ;}
using namespace std;
int n;
int dp[1000000];
int a[1000][1000];
int fun(int mask)
{
cout << " mask "<<mask<<endl;
if(pow(2,n)-1 == mask)
return 0;
if(dp[mask]!= -1){
hi;
return dp[mask];}
int mn = 1000000000;
for(int i=0;i<n;i++)
{
if(check(mask,i)==0)
{
int prize=a[i][i];
for(int j=0;j<n;j++)
{
if(i!=j && check(mask,j)!=0)
prize+=a[i][j];
}
cout << prize<< " ager i "<<i << " " <<mask<< endl;
int ret = prize+ fun(biton(mask,i));
cout << ret<< " porer i "<<i<< " "<< mask<<endl;
mn = min(mn,ret);
}
}
cout << " lkskgoervbd "<< mask<< " "<< mn<<endl;
return dp[mask]=mn;
}
int main ()
{
cin >> n;
mem(dp,-1);
for(int i=0;i<n;i++)
for(int j=0;j<n;j++)
cin >> a[i][j];
int ans= fun(0);
cout << ans <<endl;
return 0;
}