Submission #1100185

#	Time	Username	Problem	Language	Result	Execution time	Memory
1100185		_rain_	Selotejp (COCI20_selotejp)	C++14	0 / 110	4 ms	25168 KiB

Main

#include<bits/stdc++.h>
using namespace std;
#define int long long 
#define ll long long 
#define BIT(mask,x) ((mask)>>(x)&(1))
#define MASK(x) ((ll)(1)<<(x))
#define all(datastructure) datastructure.begin(),datastructure.end()
void compress(vector<int>&x){
	x.resize(unique(all(x))-x.begin());
}
template <class T1 , class T2>
	bool minU(T1 &a, T2 b){
		if (a>b) return a = b , true;
		return false;
	}
template <class T1 , class T2>
	bool maxU(T1 &a, T2 b){
		if (a<b) return a = b,true;
		return false;
	}
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count());
int Rand(int l , int r){
	return uniform_int_distribution<int> (l,r)(rng);
}

const int maxn = 1000;
const int maxm = 10;
int numrow,numcol;
bool c[maxn+2][maxm+2];
int a[maxn+2][MASK(maxm)];
int dp[maxn+2][MASK(maxm)];
int f[maxn+2][MASK(maxm)];
int un[maxn+2][MASK(maxm)];
bool can[MASK(maxm)];

bool ok(int id , int mask){
	for (int i = 0; i < numcol; ++i){
		if (BIT(mask,i) && c[id][i]==false) return false;
	}
	return true;
}
int calc(int id , int mask){
	int mask2 = mask;
	int ans = 0 , cnt = 0 , ngang = 0;
	for (int i = 0; i < numcol; ++i){
		if (BIT(mask,i)){
			ans += ngang;
			ngang = 0;
		}
		else {
			if (c[id][i]==false){
				ans += ngang;
				ngang = 0;
			}
			else 
			if (i==0||BIT(mask,i-1)||c[id][i-1]==false) ngang = 1;
		}
	};
	ans += ngang;
	int res = min(un[id-1][mask],f[id-1][mask]);
	return res + ans;
}


int32_t main(){
	ios::sync_with_stdio(false);
	cin.tie(0); cout.tie(0);
	#define name "main"
	if (fopen(name".inp","r")){
		freopen(name".inp","r",stdin);
		freopen(name".out","w",stdout);
	}
	cin >> numrow >> numcol;
	for (int i = 1; i <= numrow; ++i){
		for (int j = 0; j < numcol; ++j){
			char x; cin >> x;
			if (x=='#') c[i][j] = true; else c[i][j] = false;
		}
	}
	memset(dp,0x3f,sizeof dp);
	memset(f,0x3f,sizeof f);
	memset(un,0x3f,sizeof un);
	for (int i = 0; i < numcol; ++i) c[0][i] = false;
	for (int mask = 0; mask < MASK(numcol); ++mask) un[0][mask] = __builtin_popcount(mask);
	for (int i = 1; i <= numrow;++i){
		for (int mask = 0; mask < MASK(numcol); ++mask){
			can[mask] = ok(i,mask);
			if (can[mask])
				dp[i][mask] = calc(i,mask);
		}
		for (int mask = 0; mask < MASK(numcol); ++mask){
			un[i][mask] = dp[i][mask];
		}
		for (int j = 0; j < numcol; ++j){
			for (int mask = 0; mask < MASK(numcol); ++mask){
				if (BIT(mask,j) && can[mask])
					un[i][mask] = min(un[i][mask] , un[i][mask^MASK(j)] + 1);
			}
		}
		for (int mask = 0; mask < MASK(numcol); ++mask){
			f[i][mask] = min(un[i][mask] , dp[i][mask]);
		}
		for (int j = 0; j < numcol; ++j){
			for (int mask = MASK(numcol)-1; mask >= 0; --mask){
				if (!BIT(mask,j) && can[mask])
					f[i][mask] = min(f[i][mask] , f[i][mask|MASK(j)] - 1);
			}
		}
	}
	int ans = numrow*numcol;
	for (int mask = 0; mask < MASK(numcol); ++mask)
	{
		ans = min(dp[numrow][mask],ans);

	}
	cout << ans;
}

Compilation message (stderr)

Main.cpp: In function 'long long int calc(long long int, long long int)':
Main.cpp:43:6: warning: unused variable 'mask2' [-Wunused-variable]
   43 |  int mask2 = mask;
      |      ^~~~~
Main.cpp:44:16: warning: unused variable 'cnt' [-Wunused-variable]
   44 |  int ans = 0 , cnt = 0 , ngang = 0;
      |                ^~~
Main.cpp: In function 'int32_t main()':
Main.cpp:70:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |   freopen(name".inp","r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Main.cpp:71:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   71 |   freopen(name".out","w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 35
• Subtask 2: 0 / 35
• Subtask 3: 0 / 40