0_0_8312653_28433.c:3:22: iostream: No such file or directory
0_0_8312653_28433.c:4:20: string: No such file or directory
0_0_8312653_28433.c:6: error: syntax error before "namespace"
0_0_8312653_28433.c: In function `factorial':
0_0_8312653_28433.c:15: error: 'for' loop initial declaration used outside C99 mode
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