Contracting Of The Execution Of The Balance Of Work Under The Delivery System Of Only Construction Of The Work: "Improvement Of The Educational Service Of L.E. N° 84162 Of The Primary And Secondary Level Of The Town Of Ruris, District Of San Nicolás, Pro - Contracting Of The Execution Of The Balance Of Work Under The Construction-Only Delivery System Of The Work: "Improvement Of The Educational Service Of The L.E. N° 84162 Of The Primary And Secondary Level Of The Town Of Ruris, District Of San Nicolás, Province Of Carlos Fermin Fitzcarrald, Department