0_0_13002765_27979.c: In function `per':
0_0_13002765_27979.c:13: error: syntax error before '/' token
0_0_13002765_27979.c: At top level:
0_0_13002765_27979.c:18: error: syntax error before '+' token
0_0_13002765_27979.c:18: error: conflicting types for 'per'
0_0_13002765_27979.c:11: error: previous definition of 'per' was here
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