Submission #414834

#	Time	Username	Problem	Language	Result	Execution time	Memory
414834		amunduzbaev	Nautilus (BOI19_nautilus)	C++14	66 / 100	279 ms	262148 KiB

nautilus

/* made by amunduzbaev */
 
//~ #include <ext/pb_ds/assoc_container.hpp>
//~ #include <ext/pb_ds/tree_policy.hpp>
#include "bits/stdc++.h"
 
using namespace std;
//~ using namespace __gnu_pbds;

#define ff first
#define ss second
#define vv vector
#define pb push_back
#define mp make_pair
#define ub upper_bound
#define lb lower_bound
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(),x.rend()
#define mem(arr, v) memset(arr, v, sizeof arr)
#define NeedForSpeed ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define int long long
 
typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii; 
typedef vector<int> vii;
typedef vector<pii> vpii;
template<class T> bool umin(T& a, const T& b) { return a > b ? a = b, true : false; }
template<class T> bool umax(T& a, const T& b) { return a < b ? a = b, true : false; }
template<int sz> using tut = array<int, sz>;
void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);  
  freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
//~ template<class T> using oset = tree<T, 
//~ null_type, less_equal<T>, rb_tree_tag, 
//~ tree_order_statistics_node_update> ordered_set;
 
const int N = 505;
const int mod = 1e9+7;
const ll inf = 1e18;
const ld Pi = acos(-1);
 
#define MULTI 0
int n, m, k, t, q, ans, res, a[N][N];
int b[N], ch[4][2] = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
bitset<5005> dp[5005][N], used[N];

void solve(int t_case){
	cin>>n>>m>>k;
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			char c; cin>>c; a[i][j] = (c == '#');
		}
	}
	
	string s; cin>>s;
	for(int i=0;i<k;i++){
		if(s[i] == 'N') b[i] = 0;
		if(s[i] == 'S') b[i] = 1;
		if(s[i] == 'W') b[i] = 2;
		if(s[i] == 'E') b[i] = 3;
		if(s[i] == '?') b[i] = -1;
	}
	
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			dp[0][i][j] = !a[i][j];
		} 
	}
	
	for(int l=0;l<k;l++){
		for(int i=1;i<=n;i++){
			if(~b[l]){
				if(!b[l]) dp[l+1][i-1] |= dp[l][i];
				else if(b[l] == 1) dp[l+1][i+1] |= dp[l][i];
				else if(b[l] == 2) dp[l+1][i] |= dp[l][i]>>1;
				else dp[l+1][i] |= dp[l][i]<<1;
			} else {
				dp[l+1][i+1] |= dp[l][i];
				dp[l+1][i-1] |= dp[l][i];
				dp[l+1][i] |= dp[l][i]>>1;
				dp[l+1][i] |= dp[l][i]<<1;
			}
		} 
		
		for(int i=1;i<=n;i++) dp[l+1][i] &= dp[0][i];
	} 
	
	//~ cout<<m<<"\n";
	//~ for(int l=0;l<=k;l++){
		//~ for(int i=1;i<=n;i++){
			//~ for(int j=1;j<=m;j++) cout<<dp[l][i][j];
			//~ cout<<"\n";
		//~ } cout<<"\n";
	//~ } cout<<"\n";
	
	for(int i=1;i<=n;i++) for(int j=1;j<=m;j++) res += dp[k][i][j];
	cout<<res<<"\n";
}

/*

101000101
010100010
100111100
100111010
011101111

101000101
010000110
000111100
000111011
101001111

*/

signed main(){
	NeedForSpeed
	if(MULTI){
		int t; cin>>t;
		for(int t_case = 1; t_case <= t; t_case++) solve(t_case);
	} else solve(1);
	return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'void usaco(std::string)':
nautilus.cpp:32:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   32 | void usaco(string s) { freopen((s+".in").c_str(),"r",stdin);
      |                        ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
nautilus.cpp:33:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |   freopen((s+".out").c_str(),"w",stdout); NeedForSpeed }
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 29 / 29
• Subtask 2: 37 / 37
• Subtask 3: 0 / 34