Submission #860214

#	Time	Username	Problem	Language	Result	Execution time	Memory
860214		maks007	Nautilus (BOI19_nautilus)	C++14	66 / 100	1091 ms	2648 KiB

nautilus

#include "bits/stdc++.h"
 
using namespace std;
 
int dp[510][510];
int pref[510][510];
 
signed main () {
	map <char,char> op;
	map <char,int> it, jt;
	op['E'] = 'W';
	op['W'] = 'E';
	op['S'] = 'N';
	op['N'] = 'S';
	it['E'] = 0;
	it['W'] = 0;
	it['S'] = 1;
	it['N'] = -1;
 
	jt['E'] = 1;
	jt['W'] = -1;
	jt['S'] = 0;
	jt['N'] = 0;
	int n, m, c;
	cin >> n >> m >> c;
	string a[n+1];
	for(int i = 1; i <= n; i ++) {
		cin >> a[i];
		a[i] = ' ' + a[i];
	}
	string str;
	cin >> str;
	str = ' ' + str;
	for(int i = 1; i <= str.size(); i ++) {
		for(int posi = 1; posi <= n; posi ++) {
			for(int posj = 1; posj <= m; posj ++) {
				if(a[posi][posj] == '#') {
					dp[posi][posj] = 0;
					continue;
				}
				if(i == 1) {
					dp[posi][posj]=1;
				}else {
					if(str[i-1] == '?') {
						char ch = 'E';
						dp[posi][posj] |= pref[posi+it[ch]][posj+jt[ch]];
						ch = 'W';
						dp[posi][posj] |= pref[posi+it[ch]][posj+jt[ch]];
						ch = 'N';
						dp[posi][posj] |= pref[posi+it[ch]][posj+jt[ch]];
						ch = 'S';
						dp[posi][posj] |= pref[posi+it[ch]][posj+jt[ch]];
					}else {
						char ch = op[str[i-1]];
						dp[posi][posj] |= pref[posi+it[ch]][posj+jt[ch]];
					}
				}
			}
		}
		for(int posi = 1; posi <= n; posi ++) {
			for(int posj = 1; posj <= m; posj ++) {
				pref[posi][posj] = dp[posi][posj];
				dp[posi][posj] = 0;
			}
		}
	}
	// cout << "\n";
	int ans = 0;
	// for(int ss = 1; ss <= str.size(); ss ++) {
		for(int i = 1; i <= n; i ++) {
			for(int j = 1; j <= m; j ++) {
				// cout << dp[str.size()][i][j] << " ";
				ans += pref[i][j];
			}
			// cout << "\n";
		}
		// cout << "\n";
	// }
	cout << ans;
	return 0;
}

Compilation message (stderr)

nautilus.cpp: In function 'int main()':
nautilus.cpp:34:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |  for(int i = 1; i <= str.size(); i ++) {
      |                 ~~^~~~~~~~~~~~~

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