Submission #860190

#	Time	Username	Problem	Language	Result	Execution time	Memory
860190		maks007	Valley (BOI19_valley)	C++14	0 / 100	1239 ms	262144 KiB

valley

#include "bits/stdc++.h"
 
using namespace std;
 
int dp[110][110][110];
 
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;
	set <pair <int,int>> s;
	for(int i = 1; i <= n; i ++) {
		for(int j = 1; j <= m; j ++) s.insert({i, j});
	}
	for(int i = 1; i <= str.size(); i += 1) {
		vector <pair <int,int>> v;
		for(auto [posi, posj] : s) {
			if(a[posi][posj] == '#') {
				dp[i][posi][posj] = 0;
				v.push_back({posi, posj});
				continue;
			}
			if(i == 1) {
				dp[i][posi][posj]=1;
			}else {
				if(str[i-1] == '?') {
					char ch = 'E';
					dp[i][posi][posj] |= dp[i-1][posi+it[ch]][posj+jt[ch]];
					ch = 'W';
					dp[i][posi][posj] |= dp[i-1][posi+it[ch]][posj+jt[ch]];
					ch = 'N';
					dp[i][posi][posj] |= dp[i-1][posi+it[ch]][posj+jt[ch]];
					ch = 'S';
					dp[i][posi][posj] |= dp[i-1][posi+it[ch]][posj+jt[ch]];
				}else {
					char ch = op[str[i-1]];
					dp[i][posi][posj] |= dp[i-1][posi+it[ch]][posj+jt[ch]];
				}
			}
			if(!dp[posi][posj]) v.push_back({posi, posj});
		}
		for(auto j : v) s.erase(j);
	}
	int ans = 0;
	for(int i = 1; i <= n; i ++) {
		for(int j = 1; j <= m; j ++) {
			ans += (dp[str.size()][i][j]);
		}
	}
	cout << ans;
	return 0;
}

Compilation message (stderr)

valley.cpp: In function 'int main()':
valley.cpp:37:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |  for(int i = 1; i <= str.size(); i += 1) {
      |                 ~~^~~~~~~~~~~~~
valley.cpp:39:12: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   39 |   for(auto [posi, posj] : s) {
      |            ^

• Subtask 1: 0 / 9
• Subtask 2: 0 / 27
• Subtask 3: 0 / 23
• Subtask 4: 0 / 41