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Cod sursa(job #117332)
#include <cstdio>
#include <vector>
using namespace std;
vector< pair<int, int> > cur;
vector< vector< pair<int, int> > > game;
#define MAXB 17
char seen[ 1 << MAXB ][MAXB];
unsigned bst[ 1 << MAXB ][MAXB];
unsigned last[MAXB];
inline unsigned sqr( int x ) { return (unsigned)x * x; }
inline unsigned dist( const pair<int, int> &a, const pair<int, int> &b )
{
return sqr(a.first - b.first) + sqr(a.second - b.second);
}
int main()
{
freopen("bibel.in", "rt", stdin);
freopen("bibel.out", "wt", stdout);
game.clear(); cur.clear();
for (; 1; )
{
int type;
scanf("%d", &type);
if (type == 2)
break;
if (type == 1)
game.push_back( cur ),
cur.clear();
if (type == 0)
{
int X, Y;
scanf("%d %d", &X, &Y);
cur.push_back( make_pair(X, Y) );
}
}
memset(seen, 0, sizeof(seen));
for (size_t a = 0; a < game[0].size(); a++)
{
seen[ 1 << a ][a] = 1;
bst[ 1 << a ][a] = dist( make_pair(0, 0), game[0][a] );
}
for (size_t k = 0; k < game.size(); k++)
{
// fprintf(stderr, "game %d %d\n", k, (1 << game[k].size()));
for (int st = 1; st < (1 << game[k].size()); st++)
for (size_t a = 0; a < game[k].size(); a++)
{
if (!(st & (1 << a))) continue;
if (!seen[st][a]) continue;
for (size_t b = 0; b < game[k].size(); b++)
{
if (st & (1 << b)) continue;
unsigned val = bst[st][a] + dist( game[k][a], game[k][b] );
if (!seen[ st | (1 << b) ][b] || val < bst[ st | (1 << b) ][b])
bst[ st | (1 << b) ][b] = val,
seen[ st | (1 << b) ][b] = 1;
}
}
unsigned MIN = 0xffffffff;
for (size_t a = 0; a < game[k].size(); a++)
{
last[a] = bst[ (1 << game[k].size()) - 1 ][a];
if (last[a] < MIN)
MIN = last[a];
}
printf("%u\n", MIN);
memset( seen, 0, sizeof(seen) );
if (k + 1 < game.size())
for (size_t a = 0; a < game[k + 1].size(); a++)
{
unsigned MIN = 0xffffffff;
for (size_t b = 0; b < game[k].size(); b++)
{
unsigned val = last[b] + dist( game[k][b], game[k + 1][a] );
if (val < MIN)
MIN = val;
}
bst[ (1 << a) ][a] = MIN;
seen[ (1 << a) ][a] = 1;
}
}
return 0;
}