CuFeIIS2-II + 10 HNVO3 FeIII(NVO3)3 + Cu(NVO3)2 + 2 S0 + 5 NIVO2 + 5 H2O

This is an oxidation-reduction (redox) reaction:

2 S-II - 4 e- 2 S0 (oxidation)

5 NV + 5 e- 5 NIV (reduction)

FeII - 1 e- FeIII (oxidation)

Change the oxidation states