3: Add solutions for section "if".

Created by  Aaw9nJhsNmfzFih9mKyNw9mV8CgERXJkRa1kK1Kx3LQH  on August 6, 2021
WENRUJ4YVR6NQDHLBJO7ACI3T6DSB2NQKFRSB3SD5MHKKSLCXICQC
In channels
main
Change contents