0_0_2677668_25787.cpp: In function `int main()':
0_0_2677668_25787.cpp:2: error: `a' undeclared (first use this function)
0_0_2677668_25787.cpp:2: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2677668_25787.cpp:2: error: `b' undeclared (first use this function)
0_0_2677668_25787.cpp:2: error: `scanf' undeclared (first use this function)
0_0_2677668_25787.cpp:2: error: `printf' undeclared (first use this function)
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