oj.uz

Submission #488581

# Submission time Handle Problem Language Result Execution time Memory
488581 2021-11-19T17:15:58 Z inksamurai Selotejp (COCI20_selotejp) C++17
0 / 110
 31 ms 7372 KB 
#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){
		drep(msk,1<<m){
			rep(j,m){
				if(msk&(1<<j)){
					chmin(dp[i][msk^(1<<j)],dp[i][msk]);
				}else if(a[i][j]){
					chmin(dp[i][msk|(1<<j)],dp[i][msk]+1);
				}
			}
		}
		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
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Incorrect 31 ms 7372 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Incorrect 1 ms 204 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Incorrect 31 ms 7372 KB Output isn't correct
3 Halted 0 ms 0 KB -