oj.uz

Submission #414848

# Submission time Handle Problem Language Result Execution time Memory
414848 2021-05-31T09:13:07 Z amunduzbaev Nautilus (BOI19_nautilus) C++14
100 / 100
 254 ms 159564 KB 
/* 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];
bitset<N> dp[5005][N];
int b[5005];

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(s[l] == 'N') dp[l+1][i-1] |= dp[l][i];
				if(s[l] == 'S') dp[l+1][i+1] |= dp[l][i];
				if(s[l] == 'W') dp[l+1][i] |= dp[l][i]>>1;
				if(s[l] == 'E') 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][i]<<1;
			}
		} for(int i=1;i<=n;i++) dp[l+1][i] &= dp[0][i];
	} 
	
	for(int i=1;i<=n;i++) res += dp[k][i].count();
	cout<<res<<"\n";
}

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

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
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 2 ms 1492 KB Output is correct
3 Correct 2 ms 1492 KB Output is correct
4 Correct 2 ms 1492 KB Output is correct
5 Correct 3 ms 1492 KB Output is correct
6 Correct 2 ms 1484 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 2 ms 1492 KB Output is correct
3 Correct 2 ms 1492 KB Output is correct
4 Correct 2 ms 1492 KB Output is correct
5 Correct 3 ms 1492 KB Output is correct
6 Correct 2 ms 1484 KB Output is correct
7 Correct 2 ms 1492 KB Output is correct
8 Correct 2 ms 1492 KB Output is correct
9 Correct 2 ms 1492 KB Output is correct
10 Correct 2 ms 1492 KB Output is correct
11 Correct 2 ms 1488 KB Output is correct
12 Correct 2 ms 1484 KB Output is correct
13 Correct 2 ms 1484 KB Output is correct
14 Correct 2 ms 1500 KB Output is correct
15 Correct 2 ms 1488 KB Output is correct
16 Correct 2 ms 1492 KB Output is correct
17 Correct 2 ms 1492 KB Output is correct
18 Correct 2 ms 1492 KB Output is correct
19 Correct 2 ms 1492 KB Output is correct
20 Correct 3 ms 1492 KB Output is correct
21 Correct 3 ms 1492 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 1484 KB Output is correct
2 Correct 2 ms 1492 KB Output is correct
3 Correct 2 ms 1492 KB Output is correct
4 Correct 2 ms 1492 KB Output is correct
5 Correct 3 ms 1492 KB Output is correct
6 Correct 2 ms 1484 KB Output is correct
7 Correct 2 ms 1492 KB Output is correct
8 Correct 2 ms 1492 KB Output is correct
9 Correct 2 ms 1492 KB Output is correct
10 Correct 2 ms 1492 KB Output is correct
11 Correct 2 ms 1488 KB Output is correct
12 Correct 2 ms 1484 KB Output is correct
13 Correct 2 ms 1484 KB Output is correct
14 Correct 2 ms 1500 KB Output is correct
15 Correct 2 ms 1488 KB Output is correct
16 Correct 2 ms 1492 KB Output is correct
17 Correct 2 ms 1492 KB Output is correct
18 Correct 2 ms 1492 KB Output is correct
19 Correct 2 ms 1492 KB Output is correct
20 Correct 3 ms 1492 KB Output is correct
21 Correct 3 ms 1492 KB Output is correct
22 Correct 156 ms 159472 KB Output is correct
23 Correct 157 ms 159384 KB Output is correct
24 Correct 156 ms 159436 KB Output is correct
25 Correct 164 ms 159368 KB Output is correct
26 Correct 167 ms 159436 KB Output is correct
27 Correct 191 ms 159380 KB Output is correct
28 Correct 187 ms 159452 KB Output is correct
29 Correct 196 ms 159384 KB Output is correct
30 Correct 190 ms 159448 KB Output is correct
31 Correct 189 ms 159564 KB Output is correct
32 Correct 217 ms 159516 KB Output is correct
33 Correct 226 ms 159504 KB Output is correct
34 Correct 254 ms 159424 KB Output is correct
35 Correct 229 ms 159380 KB Output is correct
36 Correct 216 ms 159392 KB Output is correct