24584_0_28969.cpp: In function `int main()':
24584_0_28969.cpp:9: error: `cin' undeclared (first use this function)
24584_0_28969.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
24584_0_28969.cpp:13: error: `cout' undeclared (first use this function)
24584_0_28969.cpp:21: error: `OK' undeclared (first use this function)
.cpp(
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