Submission #488579

#	Time	Username	Problem	Language	Result	Execution time	Memory
488579		inksamurai	Selotejp (COCI20_selotejp)	C++17	110 / 110	158 ms	8300 KiB

Main

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rep(i,n) for(int i=0;i<(n);i++)
#define crep(i,x,n) for(int i=x;i<(n);i++)
#define drep(i,n) for(int i=(n)-1;i>=0;i--)
#define vec(...) vector<__VA_ARGS__>
#define _3HaBFkZ ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0)
using namespace std;
typedef long long ll;
typedef long double ld;
using pii=pair<int,int>;
using vi=vector<int>;

const int inf=1e9;

void chmin(int &a,int b){
	a=min(a,b);
}

int main(){
_3HaBFkZ;
	int n,m;
	cin>>n>>m;
	vec(vi) a(n,vi(n));
	rep(i,n)rep(j,m){
		char ch; cin>>ch;
		a[i][j]=ch=='#';
	}
	vec(vi) dp(n+1,vi(1<<m,inf));
	dp[0][0]=0;
	rep(i,n){
		rep(msk,1<<m){
			rep(j,m){
				if(!(msk&(1<<j)) and a[i][j]){
					chmin(dp[i][msk|(1<<j)],dp[i][msk]+1);
				}
			}
		}
		drep(msk,1<<m){
			rep(j,m){
				if(msk&(1<<j)){
					chmin(dp[i][msk^(1<<j)],dp[i][msk]);
				}
			}
		}
		vi nedp(1<<m,inf);
		rep(msk,1<<m){
			if(dp[i][msk]==inf) continue;
			bool pok=1;
			rep(j,m){
				if(msk&(1<<j) and a[i][j]==0) pok=0;
			}
			if(!pok) continue;
			int cost=0;
			for(int j=0;j<m;){
				if(!a[i][j] or msk&(1<<j)){
					j=j+1;
					continue;
				}
				cost++;
				while(a[i][j]==1 and j<m and !(msk&(1<<j))){
					j=j+1;
				}
			}
			chmin(nedp[msk],dp[i][msk]+cost);
		}
		dp[i+1]=nedp;
	}
	int ans=*min_element(all(dp[n]));
	cout<<ans<<"\n";
//	
	return 0;
}

• Subtask 1: 35 / 35
• Subtask 2: 35 / 35
• Subtask 3: 40 / 40