../programs/61921.cpp:39: error: 'pair' was not declared in this scope
../programs/61921.cpp:39: error: expected primary-expression before ',' token
../programs/61921.cpp:39: error: expected primary-expression before '>' token
../programs/61921.cpp:39: error: 'a' was not declared in this scope
../programs/61921.cpp:39: error: 'pair' was not declared in this scope
../programs/61921.cpp:39: error: expected primary-expression before ',' token
../programs/61921.cpp:39: error: expected primary-expression before '>' token
../programs/61921.cpp:39: error: 'b' was not declared in this scope
../programs/61921.cpp:39: error: initializer expression list treated as compound expression
../programs/61921.cpp:39: error: expected ',' or ';' before '{' token
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