View Compilation Error

0_0_37478031_15635.cpp:102:16: error: 'begin' function uses 'auto' type specifier without trailing return type
     auto begin() {
                ^
0_0_37478031_15635.cpp:102:16: note: deduced return type only available with -std=c++1y or -std=gnu++1y
0_0_37478031_15635.cpp:106:14: error: 'end' function uses 'auto' type specifier without trailing return type
     auto end() {
              ^
0_0_37478031_15635.cpp:106:14: note: deduced return type only available with -std=c++1y or -std=gnu++1y