Submission #1294119

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294119		trandangquang	Selotejp (COCI20_selotejp)	C++20	110 / 110	34 ms	580 KiB

Main

#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();
    }
}

Compilation message (stderr)

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);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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