Elegant Showroom

input/code.cpp: In function 'int main()':
input/code.cpp:39:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (x-1 < 0 || y-1 < 0 || x-1 >= map.size() || y-1 >= map[x-1].size())
                                             ^
input/code.cpp:39:71: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (x-1 < 0 || y-1 < 0 || x-1 >= map.size() || y-1 >= map[x-1].size())
                                                                       ^

#include <iostream>
#include <string>
#include <vector>
#include <queue>

using namespace std;

typedef pair<int, int> P;
typedef pair<int, P> BAR;
#define X first
#define Y second

int visited[500][500];
bool vv[500][500];

int main() {
	int r, c;
	cin >> r >> c;
	vector<string> map(r);
	for (string &s : map)
		cin >> s;
	
	priority_queue<BAR, vector<BAR>, greater<BAR>> q;
	int x, y;
	cin >> x >> y;
	q.push({1, P(x, y)});
	for(int i=1;i<=r;++i)for(int j=1;j<=c;++j)visited[i][j]=1e9+7;
	visited[x][y] = 1;

	while (!q.empty()) {
		auto t = q.top(); q.pop();
		int x = t.second.X;
		int y = t.second.Y;
		int d = t.first;
		if(vv[x][y])continue;
		if(d>visited[x][y])continue;
		vv[x][y]=true;
		
		if (x-1 < 0 || y-1 < 0 || x-1 >= map.size() || y-1 >= map[x-1].size())
			continue;
		char r = map[x-1][y-1];
		
		//cout<<x<<" "<<y<<" "<<d<<" "<<r<<endl;
		
		if (r == '#')
			continue;
		
		if (r == 'D')
			d--;
		
		if (x == 1 || y == 1 || x == r || y == c) {
			cout << d << "\n";
			return 0;
		}
		
		#define FOO(x, y) \
		if (visited[x][y]>d+1) { \
			q.push({d+1, P(x, y)}); \
			visited[x][y] = d+1; \
		}
		FOO(x+1,y)
		FOO(x-1,y)
		FOO(x,y+1)
		FOO(x,y-1)
	}
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED

Test 14

Verdict: ACCEPTED

Test 15

Verdict: ACCEPTED

Test 16

Verdict: ACCEPTED