oj.uz

Submission #864071

# Submission time Handle Problem Language Result Execution time Memory
864071 2023-10-21T21:50:58 Z MilosMilutinovic Selotejp (COCI20_selotejp) C++14
110 / 110
 318 ms 600 KB 
#include<bits/stdc++.h>

#define pb push_back
#define fi first
#define se second
#define mp make_pair

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;

template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}

int readint(){
	int x=0,f=1; char ch=getchar();
	while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
	while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
	return x*f;
}

int n,m,dp[1<<15],val[1<<15],a[15];
char s[1005][15];

int solve(char* str,int mask){
	for(int i=0;i<m;i++) a[i]=(str[i]=='#')^(mask>>i&1);
	int ret=0;
	for(int i=0;i<m;i++) if(a[i]==1&&(i==0||a[i-1]==0)) ret++;
	return ret;
}

int main(){
	n=readint(); m=readint();
	for(int i=1;i<=n;i++) scanf("%s",s[i]);
	for(int mask=1;mask<(1<<m);mask++) val[mask]=1e9;
	for(int i=1;i<=n;i++){
		for(int mask=0;mask<(1<<m);mask++) dp[mask]=1e9;
		for(int mask=0;mask<(1<<m);mask++){
			bool ok=true;
			for(int j=0;j<m;j++) if((mask>>j&1)&&s[i][j]=='.') ok=false;
			if(!ok) continue;
			int ft=solve(s[i],mask);
			dp[mask]=val[0]+__builtin_popcount(mask)+ft;
			for(int submask=mask;submask;submask=(submask-1)&mask)
				dp[mask]=min(dp[mask],val[submask]+__builtin_popcount(mask^submask)+ft);
		}
		for(int mask=0;mask<(1<<m);mask++) val[mask]=1e9;
		for(int mask=0;mask<(1<<m);mask++){
			for(int submask=mask;submask;submask=(submask-1)&mask)
				val[submask]=min(val[submask],dp[mask]);
			val[0]=min(val[0],dp[mask]);
		}
	}
	int ans=1e9;
	for(int mask=0;mask<(1<<m);mask++) ans=min(ans,dp[mask]);
	printf("%d\n",ans);
	return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:38:29: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   38 |  for(int i=1;i<=n;i++) scanf("%s",s[i]);
      |                        ~~~~~^~~~~~~~~~~

Subtask #1
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 99 ms 348 KB Output is correct
3 Correct 12 ms 344 KB Output is correct
4 Correct 33 ms 348 KB Output is correct
5 Correct 107 ms 348 KB Output is correct
6 Correct 108 ms 344 KB Output is correct
7 Correct 114 ms 348 KB Output is correct
8 Correct 99 ms 348 KB Output is correct
9 Correct 100 ms 348 KB Output is correct
10 Correct 234 ms 476 KB Output is correct

Subtask #2
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Correct 2 ms 348 KB Output is correct
5 Correct 2 ms 344 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 2 ms 600 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 99 ms 348 KB Output is correct
3 Correct 12 ms 344 KB Output is correct
4 Correct 33 ms 348 KB Output is correct
5 Correct 107 ms 348 KB Output is correct
6 Correct 108 ms 344 KB Output is correct
7 Correct 114 ms 348 KB Output is correct
8 Correct 99 ms 348 KB Output is correct
9 Correct 100 ms 348 KB Output is correct
10 Correct 234 ms 476 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 2 ms 348 KB Output is correct
14 Correct 2 ms 348 KB Output is correct
15 Correct 2 ms 344 KB Output is correct
16 Correct 1 ms 460 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 2 ms 600 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 13 ms 468 KB Output is correct
21 Correct 37 ms 348 KB Output is correct
22 Correct 104 ms 456 KB Output is correct
23 Correct 102 ms 456 KB Output is correct
24 Correct 103 ms 344 KB Output is correct
25 Correct 113 ms 596 KB Output is correct
26 Correct 152 ms 344 KB Output is correct
27 Correct 224 ms 452 KB Output is correct
28 Correct 318 ms 596 KB Output is correct