Submission #736149

#	Time	Username	Problem	Language	Result	Execution time	Memory
736149		marvinthang	Selotejp (COCI20_selotejp)	C++17	110 / 110	19 ms	360 KiB

Main

/******************************
*    author : @marvinthang    *
*    date : 11 / 02 / 2022    *
******************************/

#include <bits/stdc++.h>

using namespace std;

#define  superspeed  ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
#define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }

template <class U, class V> ostream & operator << (ostream& out, const pair<U, V> &p) { return out << '(' << p.first << ", " << p.second << ')'; }
template <class T> ostream & operator << (ostream &out, const vector<T> &vt) { out << '{'; for (size_t i = 0; i + 1 < vt.size(); i++) out << vt[i] << ", "; if (!vt.empty()) out << vt.back(); return out << '}'; }

const 		int MOD = 1e9 + 7;
const     double PI = 3.1415926535897932384626433832795; // acos(-1.0); atan(-1.0);
const     int dir[] = {0, 1, 0, -1, 0}; // {0, 1, 1, -1, -1, 1, 0, -1, 0};
const  long long oo = 1e9;
const       int MAX = 1003;

int N, M;
char c[MAX][11];

int main(void) {
    superspeed;
    file("coci2021_r3_selotejp");
    cin >> N >> M;
    for (int i = 1; i <= N; ++i)
    	for (int j = 1; j <= M; ++j)
    		cin >> c[i][j];
    vector <int> F(1 << M, oo), G(1 << M);
    F[0] = 0;
    for (int i = 1; i <= N; ++i) {
    	for (int j = 1; j <= M; ++j) {
    		for (int k = 0; k < 1 << M; ++k) {
    			if (k >> j - 1 & 1) {
    				if (c[i][j] == '.') G[k] = oo;
					else G[k] = min(F[k], F[k ^ 1 << j - 1] + 1);
    			} else {
    				G[k] = min(F[k], F[k ^ 1 << j - 1]);
    				if (c[i][j] == '#' && 
    					(j == 1 || k & 1 << j - 2 || c[i][j - 1] == '.'))
    					++G[k];
    			}
    		}
    		F = G;
    	}
    }
    cout << *min_element(F.begin(), F.end());
    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:37:19: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   37 |        if (k >> j - 1 & 1) {
      |                 ~~^~~
Main.cpp:39:41: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   39 |      else G[k] = min(F[k], F[k ^ 1 << j - 1] + 1);
      |                                       ~~^~~
Main.cpp:41:39: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   41 |         G[k] = min(F[k], F[k ^ 1 << j - 1]);
      |                                     ~~^~~
Main.cpp:43:32: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   43 |          (j == 1 || k & 1 << j - 2 || c[i][j - 1] == '.'))
      |                              ~~^~~
Main.cpp:11:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | #define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                     ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:27:5: note: in expansion of macro 'file'
   27 |     file("coci2021_r3_selotejp");
      |     ^~~~
Main.cpp:11:95: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | #define  file(name)  if (fopen (name".inp", "r")) { freopen (name".inp", "r", stdin); freopen (name".out", "w", stdout); }
      |                                                                                       ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:27:5: note: in expansion of macro 'file'
   27 |     file("coci2021_r3_selotejp");
      |     ^~~~

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