Problem You are given two string and of the length of . You can perform following operation : 1.selects some subset of positions of such that 2.selects a letter , and sets each letter in positions , to letter Minimize the number of operati…

Problem Problem - C - CodeforcesI could not solve problem A, so I have no rating change in this contest :( You are given an array of permutation of . You can perform the following operation any number of time : choose two-element such that…