#include<bits/stdc++.h> using namespace std; #define foru(i,a,b) for(int i=(a); i<=(b); ++i) #define ford(i,a,b) for(int i=(a); i>=(b); --i) #define rep(i,a) for(int i=0; i<(a); ++i) #define sz(a) (int)(a).size() #define all(a) (a).begin(),(a).end() #define bit(s,i) (((s)>>(i))&1) #define ii pair<int,int> #define vi vector<int> #define vii vector<ii> #define fi first #define se second #define ll long long #define eb emplace_back #define pb push_back #define __builtin_popcount __builtin_popcountll #define _ << " " << template <class X, class Y> bool maxi(X &x, Y y){return x<y?x=y,true:false;} template <class X, class Y> bool mini(X &x, Y y){return x>y?x=y,true:false;} const int N=1010; const int M=10; const int INF=1e9; int n,m,g[M+1][1<<M]; char a[N][M]; void solve(){ cin>>n>>m; foru(i,1,n) foru(j,1,m) cin>>a[i][j]; memset(g,0x3f,sizeof(g)); g[0][0]=0; foru(i,1,n){ foru(j,0,m-1) rep(msk,1<<m){ if(a[i][j+1]=='#'){ if(j>0 && a[i][j]=='#' && !bit(msk,j-1)) mini(g[j+1][msk&(~(1<<j))], g[j][msk]); if(a[i-1][j+1]=='#' && bit(msk,j)) mini(g[j+1][msk], g[j][msk]); mini(g[j+1][msk|(1<<j)], g[j][msk]+1); mini(g[j+1][msk&(~(1<<j))], g[j][msk]+1); } else{ mini(g[j+1][msk&(~(1<<j))], g[j][msk]); } } rep(msk,1<<m){ g[0][msk]=g[m][msk]; } foru(j,1,m) rep(msk,1<<m){ g[j][msk]=INF; } } int res=INF; rep(msk,1<<m) mini(res,g[0][msk]); cout<<res<<'\n'; } int32_t main(){ #define task "test" if(fopen(task".inp", "r")){ freopen(task".inp", "r", stdin); freopen(task".out", "w", stdout); } cin.tie(0)->sync_with_stdio(0); int tc=1; //cin>>tc; foru(i,1,tc){ solve(); } }

Main.cpp: In function 'int32_t main()':
Main.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~