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Cod sursa(job #921272)
#include <cstring>
#include <fstream>
#include <vector>
using namespace std;
const int MAX_N = 17;
const int INF = 0x3f3f3f3f;
const int MAX_C = (1 << MAX_N) + 2;
int N, t, Nr = 1;
int Cost[MAX_N][MAX_N], A[MAX_N][2], B[MAX_C][MAX_N], Min[MAX_N], last[MAX_N][3];
vector < int > v[MAX_N];
inline int dist(int x1, int x2, int y1, int y2)
{
return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
}
int main()
{
ifstream f("bibel.in");
ofstream g("bibel.out");
memset(Cost, INF, sizeof(Cost));
while(t != 2)
{
f >> t;
if(!t)
f >> A[N][0] >> A[N][1], ++N;
else if(t == 1)
{
int Sum = INF;
for(int i = 0; i < N; ++i)
for(int j = 0; j < N; ++j)
if(i != j)
{
Cost[i][j] = Cost[j][i] = dist(A[i][0], A[j][0], A[i][1], A[j][1]);
v[i].push_back(j), v[j].push_back(i);
}
memset(B, INF, sizeof(B));
for(int i = 0; i < N; ++i)
for(int j = 0; j < Nr; ++j)
B[1 << i][i] = min(B[1 << i][i], Min[j] + dist(last[j][0], A[i][0], last[j][1], A[i][1]));
for(int i = 1; i < (1 << N); ++i)
for(int j = 0; j < N; ++j)
if(i & (1 << j))
{
for(int k = 0; k < v[j].size(); ++k)
if(i & (1 << v[j][k]))
B[i][j] = min(B[i][j], B[i ^ (1 << j)][ v[j][k] ] + Cost[ v[j][k] ][j]);
}
int Tmp = INF;
for(int i = 0; i < N; ++i)
Tmp = min(Tmp, B[(1 << N) - 1][i]);
if(Tmp < Sum)
Sum = Tmp;
for(int i = 0; i < N; ++i)
Min[i] = B[(1 << N) - 1][i];
memset(Cost, INF, sizeof(Cost));
Nr = N;
for(int i = 0; i < Nr; ++i)
last[i][0] = A[i][0], last[i][1] = A[i][1];
for(int i = 0; i < N; ++i)
v[i].clear();
N = 0;
g << Sum << '\n';
}
}
f.close();
g.close();
return 0;
}