Submission #933392

#	Time	Username	Problem	Language	Result	Execution time	Memory
933392		pan	Selotejp (COCI20_selotejp)	C++17	35 / 110	10 ms	484 KiB

Main

#include <bits/stdc++.h>
//#include <ext/pb_ds/assoc_container.hpp>
//#include <ext/pb_ds/tree_policy.hpp>
//#include "bits_stdc++.h"
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define lb lower_bound
#define ub upper_bound
#define input(x) scanf("%lld", &x);
#define input2(x, y) scanf("%lld%lld", &x, &y);
#define input3(x, y, z) scanf("%lld%lld%lld", &x, &y, &z);
#define input4(x, y, z, a) scanf("%lld%lld%lld%lld", &x, &y, &z, &a);
#define print(x, y) printf("%lld%c", x, y);
#define show(x) cerr << #x << " is " << x << endl;
#define show2(x,y) cerr << #x << " is " << x << " " << #y << " is " << y << endl;
#define show3(x,y,z) cerr << #x << " is " << x << " " << #y << " is " << y << " " << #z << " is " << z << endl;
#define discretize(x) sort(x.begin(), x.end()); x.erase(unique(x.begin(), x.end()), x.end());
using namespace std;
//using namespace __gnu_pbds;
//#define ordered_set tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update>
//#define ordered_multiset tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
typedef long long ll;
typedef long double ld;
typedef pair<ld, ll> pd;
typedef pair<string, ll> psl;
typedef pair<ll, ll> pi;
typedef pair<ll, pi> pii;
ll const INF = 1e13;

int main()
{
	ll n, m;
	ll ans = 0;
	input2(n, m);
	vector<string> graph(n);
	for (ll i=0; i<n; ++i) cin >> graph[i];
	vector<ll> prevv((1<<m), INF);
	prevv[0] = 0;
	for (ll r=0; r<n; ++r)
	{
		for (ll c=0; c<m; ++c)
		{
			if (graph[r][c]=='.') continue;
			ans = INF;
			vector<ll> dp(1<<m, INF);
			for (ll mask =0; mask<(1<<m); ++mask)
			{
				if (mask&(1<<c)) // vertical
				{
					if (r>0 && graph[r-1][c]=='#') {dp[mask] = prevv[mask];}
					else {dp[mask] = min(prevv[mask], prevv[mask^(1<<c)]) + 1;}
				}
				else// horizontal
				{
					if (c>0 && graph[r][c-1]=='#' && (mask&(1<<(c-1)))==0) {dp[mask] = min(prevv[mask], prevv[mask^(1<<c)]);}
					else {dp[mask] =  min(prevv[mask], prevv[mask^(1<<c)]) + 1;}
				}
				ans = min(ans, dp[mask]);
				
				
			}
			swap(dp, prevv);
		}
	}
	print(ans, '\n');
	return 0;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:12:27: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | #define input2(x, y) scanf("%lld%lld", &x, &y);
      |                      ~~~~~^~~~~~~~~~~~~~~~~~~~
Main.cpp:36:2: note: in expansion of macro 'input2'
   36 |  input2(n, m);
      |  ^~~~~~

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