( interaction force, acting on current particle i. In our case there are only two types of particle-particle interactions: Weeks-Chandler-Andersen potential which is cutted and shifted to minima position LJ potential -this potential is 𝑈 = 3ϵ σ/𝑟 ( ) 12 -σ/𝑟 ( ) Classical algorithm of clusterization was utilized with cut-off distance r c = 1.5 σ to separate monomers in condensed state from monomers in stretched loops with simple modification -bonded particles were excluded from neighbors and two connected monomers i and i+1 could be found in the single cluster only if there is a path between them through other neighbors.