View Compilation Error

0_0_37032609_26818.cpp:46:30: error: unable to find numeric literal operator 'operator""i'
 int r=250001,l=250000,fa=0,f=1i
                              ^
0_0_37032609_26818.cpp:46:30: note: use -std=gnu++11 or -fext-numeric-literals to enable more built-in suffixes
0_0_37032609_26818.cpp:138:1: error: expected ',' or ';' at end of input
 }
 ^