0_0_23247943_6300.cpp:20:51: error: no macro name given in #define directive
#define //freopenr //freopen("in.txt", "r", stdin)
^
0_0_23247943_6300.cpp:21:53: error: no macro name given in #define directive
#define //freopenw //freopen("out.txt", "w", stdout)
^
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