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#include <fstream>
#include <random>
#include <cinttypes>
#include <vector>
#include <string>
#include "pcg-cpp/include/pcg_random.hpp"
#include "randutils/randutils.hpp"
using Rng = randutils::random_generator<pcg32>;
class ClusterTree {
private:
std::vector<signed> p;
std::vector<unsigned> o;
unsigned findroot(unsigned i) {
if (p[i] < 0)
return i;
else
return p[i] = this->findroot(p[i]);
}
void join(unsigned i, unsigned j) {
if (o[i] < o[j]) {
p[i] = j;
o[j] += o[i];
} else {
p[j] = i;
o[i] += o[j];
}
}
public:
ClusterTree(unsigned n) : p(n, -1), o(n, 1) {}
void add_bond(unsigned v0, unsigned v1) {
unsigned i = this->findroot(v0);
unsigned j = this->findroot(v1);
if (i != j) {
this->join(i, j);
}
}
bool same_component(unsigned v0, unsigned v1) {
unsigned i = this->findroot(v0);
unsigned j = this->findroot(v1);
return i == j;
}
signed pointer(unsigned i) const {
return p[i];
}
unsigned size(unsigned i) const {
return o[i];
}
};
int main(int argc, char* argv[]) {
unsigned N = 10;
unsigned T = 1000;
double δ = 1.0 / 8;
int opt;
while ((opt = getopt(argc, argv, "N:T:d:")) != -1) {
switch (opt) {
case 'N':
N = (unsigned)atof(optarg);
break;
case 'T':
T = (unsigned)atof(optarg);
break;
case 'd':
δ = atof(optarg);
break;
default:
exit(1);
}
}
Rng rng;
std::uniform_real_distribution<double> dr(0.0, 1.0);
std::vector<uint64_t> ns(T);
std::vector<uint64_t> nS(T);
for (unsigned i = 0; i < N; i++) {
ClusterTree G(T);
for (unsigned t = 0; t < T; t++) {
if (rng.uniform(0.0, 1.0) < δ) {
G.add_bond(rng.uniform<unsigned>(0, t), rng.uniform<unsigned>(0, t));
}
}
unsigned maxSize = 0;
for (unsigned j = 0; j < T; j++) {
if (G.pointer(j) < 0) {
ns[G.size(j) - 1]++;
if (G.size(j) > maxSize) {
maxSize= G.size(j);
}
}
}
nS[maxSize - 1]++;
}
std::string filename = "ns_" + std::to_string(δ) + "_" + std::to_string(T) + ".dat";
std::ifstream outfile(filename);
std::vector<uint64_t> ns_old(T, 0);
if (outfile.is_open()) {
for (unsigned i = 0; i < T; i++) {
uint64_t num;
outfile >> num;
ns_old[i] = num;
}
outfile.close();
}
std::ofstream file_out(filename);
for (unsigned i = 0; i < T; i++) {
file_out <<std::fixed<< ns_old[i] + ns[i] << " ";
}
std::string filename_S = "nS_" + std::to_string(δ) + "_" + std::to_string(T) + ".dat";
std::ifstream outfile_S(filename_S);
std::vector<uint64_t> nS_old(T, 0);
if (outfile_S.is_open()) {
for (unsigned i = 0; i < T; i++) {
uint64_t num;
outfile_S >> num;
nS_old[i] = num;
}
outfile_S.close();
}
std::ofstream file_out_S(filename_S);
for (unsigned i = 0; i < T; i++) {
file_out_S <<std::fixed<< nS_old[i] + nS[i] << " ";
}
return 0;
}
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