Submission #1011842

#	Time	Username	Problem	Language	Result	Execution time	Memory
1011842		suren	Patkice (COCI20_patkice)	C++17	50 / 50	1 ms	448 KiB

patkice

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
#define mk make_pair
#define S second
#define F first
string s[145];
ll n, m;
bool vis[145][145];
void clear(){
	for(int i = 0; i < 100; i ++ ){
		for(int j = 0; j < 100; j ++ )
			vis[i][j] = 0;
	}
}
pair< ll, ll > bfs( ll X, ll Y ){
	queue< pair< pair< ll, ll >, ll > > q;
	while( q.size() ){
		q.pop();
	}
	q.push( { {X, Y}, 0 } );
	while( q.size() ){
		ll x = q.front().F.F;
		ll y = q.front().F.S;
//		cout << "coor" << x << " " << y <<"\n";
		ll tier = q.front().S;
		q.pop();
		if( vis[x][y] == 1 )
			continue;
		vis[x][y] = 1;
		
		
		if( s[x][y] == 'x' ){
			return {1,tier};
		}
//		cout << "node:" << s[x][y] << "\n";
//		cout << "vis" << vis[x][y] << "\n";
		if( vis[x][y-1] == 0 && s[x][y] == '<' ){
			q.push({{x,y-1}, tier+1});
			continue;
		}
		if( vis[x-1][y] == 0 && s[x][y] == '^' ){
			q.push({{x-1,y}, tier+1});
			continue;
		}
		if( vis[x][y+1] == 0 && s[x][y] == '>' ){
			q.push({{x,y+1}, tier+1});
			continue;
		}
		if( vis[x+1][y] == 0 && s[x][y] == 'v' ){
			q.push({{x+1,y}, tier+1});
			continue;	
		}
		return {0,0};
	}
	return {0,0};
}
int main(){
//	ios_base::sync_with_stdio(NULL);
//	cin.tie(NULL);
//	cout.tie(NULL);
	cin >> n >> m;
	for(int i = 0; i < n; i ++ )
		cin >> s[i];
	ll stx, sty;
	for(int i = 0; i < n; i ++ ){
		for(int j = 0; j < m; j ++ ){
			if( s[i][j] == 'o' ){
				stx = i, sty = j;
			}
		}
	}
	vector < pair< ll, char > > ans;
	pair < ll, ll > p;
	clear();
	if( sty > 0 ){
		p = bfs( stx, sty-1 );
		if( p.F == 1 ){
			ans.pb( {p.S, 'W'} );
		}
	}
	clear();
	if( sty < m-1 ){
		p = bfs( stx, sty+1 );
		if( p.F == 1 ){
			ans.pb( {p.S, 'E'} );
		}
	}
	clear();
	if( stx > 0 ){
		p = bfs( stx-1, sty );
		if( p.F == 1 ){
			ans.pb( {p.S, 'N'} );
		}
	}
	clear();
	if( stx < n-1 ){
		p = bfs( stx+1, sty );
		if( p.F == 1 ){
			ans.pb( {p.S, 'S'} );
		}
	}
	sort( ans.begin(), ans.end() );
	if( ans.size() > 0 ){
		cout << ":)\n";
		cout << ans[0].S << "\n";
	}else{
		cout << ":(\n";
	}
	return 0;
}

Compilation message (stderr)

patkice.cpp: In function 'int main()':
patkice.cpp:85:23: warning: 'sty' may be used uninitialized in this function [-Wmaybe-uninitialized]
   85 |   p = bfs( stx, sty+1 );
      |                       ^
patkice.cpp:99:23: warning: 'stx' may be used uninitialized in this function [-Wmaybe-uninitialized]
   99 |   p = bfs( stx+1, sty );
      |                       ^

• Subtask 1: 30 / 30
• Subtask 2: 20 / 20