| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 1002049 | vjudge1 | Robots (APIO13_robots) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define pb push_back
#define pob pop_back
#define int long long
#define int2 __int128_t
#define Shrek_Crush228 ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
#define F first
#define S second
#define sz size()
#define FOR( i, x, n, d ) for( int i = x; i <= n; i += d )
#define FORR( i, x, n, d ) for( int i = x; i >= n; i -= d )
#define lb lower_bound
#define ub upper_bound
#define all(x) x.begin(), x.end()
#define no cout << "NO\n"
#define yes cout << "YES\n"
#define nep next_permutation
#define sigma signed
#define pii pair <int, int>
using namespace std;
string alp = "abcdefghijklmnopqrstuvwxyz";
string ae = "aoeiuy";
string nums = "123456789";
const int N = 3e5 + 123;
const int inf = 1e18;
const int MOD = 1e9 + 7;
const int MOD1 = 998244353;
int a[N], b[N], c[N], d[N], l, r, n, k, m, w, cur, cnt, res, sum, sum1, x, y, ans, ans1, mx = -inf, mn = inf, ind, ind1, pref[N], suf[N];
string s, s1;
struct RT
{
int sum, l, r, ind;
};
int gcd( int a, int b )
{
return ( b ? gcd( b, a % b ) : a );
}
int lcm( int a, int b )
{
return a / gcd( a, b ) * b;
}
int bp( int a, int b, int m )
{
if( !b ) return 1;
if( b & 1 ) return bp( a, b - 1, m ) * a % m;
int it = bp( a, b >> 1, m );
return it * it % m;
}
struct po
{
int v1, v2, v3;
};
char maze[505][505];
int used[505][505];
pii to_left( int x, int y )
{
if( maze[x][y] == 'A' ) return to_down( x, y );
if( maze[x][y] == 'C' ) return to_up( x, y );
if( maze[x][y - 1] == 'x' || y - 1 < 1 ) return { x, y };
return to_left( x, y - 1 );
}
pii to_right( int x, int y )
{
if( maze[x][y] == 'A' ) return to_up( x, y );
if( maze[x][y] == 'C' ) return to_down( x, y );
if( maze[x][y + 1] == 'x' || y + 1 > m ) return { x, y };
return to_right( x, y + 1 );
}
pii to_up( int x, int y )
{
if( maze[x][y] == 'A' ) return to_left( x, y );
if( maze[x][y] == 'C' ) return to_right( x, y );
if( maze[x - 1][y] == 'x' || x - 1 < 1 ) return { x, y };
return to_up( x - 1, y );
}
pii to_down( int x, int y )
{
if( maze[x][y] == 'A' ) return to_rigth( x, y );
if( maze[x][y] == 'C' ) return to_left( x, y );
if( maze[x + 1][y] == 'x' || x + 1 > n ) return { x, y };
return to_down( x + 1, y );
}
void get( int xn, int yn, int xst, int yst, int dist )
{
if( used[xn][yn] < dist ) return;
if( xn == xst && yn == yst )
{
ans = min( ans, dist );
return;
}
used[xn][yn] = dist;
int xl, yl, xr, yr, xu, yu, xd, yd, okl = 0, okr = 0, oku = 0, okd = 0;
tie( xl, yl ) = to_left( xn, yn );
tie( xr, yr ) = to_right( xn, yn );
tie( xu, yu ) = to_up( xn, yn );
tie( xd, yd ) = to_down( xn, yn );
get( xl, yl, xst, yst, dist + 1 );
get( xr, yr, xst, yst, dist + 1 );
get( xu, yu, xst, yst, dist + 1 );
get( xd, yd, xst, yst, dist + 1 );
}
void clean()
{
FOR( i, 0, n + 1, 1 )
{
FOR( j, 0, m + 1, 1 ) used[i][j] = inf;
}
}
void solve()
{
cin >> k >> n >> m;
int x1, y1, x2, y2;
FOR( i, 1, n, 1 )
{
FOR( j, 1, m, 1 )
{
cin >> maze[i][j];
if( maze[i][j] == '1' ) x1 = i, y1 = j;
if( maze[i][j] == '2' ) x2 = i, y2 = j;
}
}
ans = 1e9;
pii L = to_left( x2, y2 ), R = to_right( x2, y2 ), U = to_up( x2, y2 ), D = to_down( x2, y2 );
clean();
get( x1, y1, L.F, L.S, 1 );
clean();
get( x1, y1, R.F, R.S, 1 );
clean();
get( x1, y1, U.F, U.S, 1 );
clean();
get( x1, y1, D.F, D.S, 1 );
clean();
get( x1, y1, x2, y2, 0 );
cout << ( ans == 1e9 ? -1 : ans );
}
sigma main()
{
//freopen("haircut.in", "r", stdin);
//freopen("haircut.out", "w", stdout);
Shrek_Crush228
int test = 1;
if( !test ) cin >> test;
while( test -- )
{
solve();
}
}
//// solved by KluydQ
/*
1.........
AA.x4.....
..A..x....
2....x....
..C.3.A...
*/