OJ-Problems-Source/HDOJ/1195_autoAC.cpp

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2016-08-13 10:51:15 +08:00
#include<iostream>
#include<queue>
using namespace std;
struct note
{
int num[4];
int count;
};
bool mark[10][10][10][10] = { false };
void bfs(note dd, note b1)
{
queue <note> q;
note now, next;
now = dd;
now.count = 0;
q.push(now);
while (!q.empty())
{
now = q.front();
q.pop();
if (now.num[0] == b1.num[0] && now.num[1] == b1.num[1] && now.num[2] == b1.num[2] && now.num[3] == b1.num[3])
{
cout << now.count << endl;
return;
}
for (int i = 0; i<4; i++)
{
next = now;
next.num[i]++;
if (next.num[i] == 10)
next.num[i] = 1;
if (mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] != true)
{
mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] = true;
next.count++;
q.push(next);
}
}
for (int i = 0; i<4; i++)
{
next = now;
next.num[i]--;
if (next.num[i] == 0)
next.num[i] = 9;
if (mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] != true)
{
mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] = true;
next.count++;
q.push(next);
}
}
for (int i = 0; i<3; i++)
{
next = now;
int temp = next.num[i];
next.num[i] = next.num[i + 1];
next.num[i + 1] = temp;
if (mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] != true)
{
mark[next.num[0]][next.num[1]][next.num[2]][next.num[3]] = true;
next.count++;
q.push(next);
}
}
}
}
int main()
{
int size;
cin >> size;
for (int i = 0; i<size; i++)
{
memset(mark, false, sizeof(mark));
int a, b;
cin >> a >> b;
note a1, b1;
for (int i = 3; i >= 0; i--)
{
a1.num[i] = a % 10;
a /= 10;
b1.num[i] = b % 10;
b /= 10;
}
bfs(a1, b1);
}
}