oj.uz

Submission #171053

# Submission time Handle Problem Language Result Execution time Memory
171053 2019-12-27T08:46:31 Z dndhk Nautilus (BOI19_nautilus) C++14
66 / 100
 1000 ms 5988 KB 
#include <bits/stdc++.h>

#define all(v) (v).begin(), (v).end()
#define sortv(v) sort(all(v))
#define uniqv(v) (v).erase(unique(all(v)), (v).end())
#define pb push_back
#define FI first
#define SE second
#define lb lower_bound
#define ub upper_bound
#define mp make_pair
#define test 1
#define TEST if(test)

using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;

const int MOD = 1000000007; // 998244353
const int INF = 2e9;
const ll INFLL = 1e18;
const int MAX_N = 500;

int N, M, Q;
string arr[MAX_N+1];
bool dp[MAX_N+1][MAX_N+1];
string str;
int dx[4] = {0, 0, 1, -1}, dy[4] = {1, -1, 0, 0};
char c[4] = {'E', 'W', 'S', 'N'};

bool chk(int x, int y){
	if(x<0 || x>=N || y<0 || y>=M)	return false;
	return (arr[x][y]=='.');
}
vector<pii> vt[2];
void add(int x, int y){
	if(!dp[x][y]){
		dp[x][y] = true;
		vt[1].pb({x, y});
	}
}

int main(){
	scanf("%d%d%d", &N, &M, &Q);	
	for(int i=0; i<N; i++){
		cin>>arr[i];
		for(int j=0; j<M; j++){
			if(arr[i][j]=='.'){
				vt[0].pb({i, j});
			}
			//dp[0][i][j] = (arr[i][j]=='.');
			//cout<<dp[0][i][j];
		}//cout<<endl;
	}
	cin>>str;
	for(int k=0; k<Q; k++){
		if(str[k]=='?'){
			for(pii p : vt[0]){
				int i = p.first, j = p.second;
				for(int k=0; k<4; k++){
					if(chk(i+dx[k], j+dy[k])){
						add(i+dx[k], j+dy[k]);
					}
				}
			}
		}else{
			int t;
			for(t=0; t<4; t++){
				if(str[k]==c[t])	break;
			}
			//cout<<t<<endl;
			for(pii p : vt[0]){
				int i = p.first, j = p.second;
				if(chk(i+dx[t], j+dy[t])){
					add(i+dx[t], j+dy[t]);
				}	
			}	
		}
		while(!vt[0].empty())	vt[0].pop_back();
		while(!vt[1].empty()){
			vt[0].pb(vt[1].back());
			dp[vt[1].back().first][vt[1].back().second] = false;
			vt[1].pop_back();
		}
	}
	cout<<vt[0].size();
	return 0;
}

Compilation message

nautilus.cpp: In function 'int main()':
nautilus.cpp:47:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d%d", &N, &M, &Q); 
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 760 KB Output is correct
2 Correct 4 ms 764 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct

Subtask #2
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 760 KB Output is correct
2 Correct 4 ms 764 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 22 ms 632 KB Output is correct
8 Correct 8 ms 632 KB Output is correct
9 Correct 4 ms 504 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 25 ms 760 KB Output is correct
13 Correct 28 ms 632 KB Output is correct
14 Correct 24 ms 632 KB Output is correct
15 Correct 4 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 28 ms 760 KB Output is correct
18 Correct 32 ms 632 KB Output is correct
19 Correct 21 ms 504 KB Output is correct
20 Correct 8 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct

Subtask #3
0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 17 ms 760 KB Output is correct
2 Correct 4 ms 764 KB Output is correct
3 Correct 3 ms 504 KB Output is correct
4 Correct 3 ms 504 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 22 ms 632 KB Output is correct
8 Correct 8 ms 632 KB Output is correct
9 Correct 4 ms 504 KB Output is correct
10 Correct 3 ms 504 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 25 ms 760 KB Output is correct
13 Correct 28 ms 632 KB Output is correct
14 Correct 24 ms 632 KB Output is correct
15 Correct 4 ms 376 KB Output is correct
16 Correct 3 ms 376 KB Output is correct
17 Correct 28 ms 760 KB Output is correct
18 Correct 32 ms 632 KB Output is correct
19 Correct 21 ms 504 KB Output is correct
20 Correct 8 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Execution timed out 1069 ms 5988 KB Time limit exceeded
23 Halted 0 ms 0 KB -