176816_0_15347.c: In function `main':
176816_0_15347.c:5: error: `int_64' undeclared (first use in this function)
176816_0_15347.c:5: error: (Each undeclared identifier is reported only once
176816_0_15347.c:5: error: for each function it appears in.)
176816_0_15347.c:5: error: syntax error before "sum"
176816_0_15347.c:10: error: `sum' undeclared (first use in this function)
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