0_0_6360875_22350.c:3:16: queue: No such file or directory
0_0_6360875_22350.c:5: error: syntax error before "namespace"
0_0_6360875_22350.c: In function `spfa':
0_0_6360875_22350.c:25: error: `queue' undeclared (first use in this function)
0_0_6360875_22350.c:25: error: (Each undeclared identifier is reported only once
0_0_6360875_22350.c:25: error: for each function it appears in.)
0_0_6360875_22350.c:25: error: syntax error before "int"
0_0_6360875_22350.c:26: error: `Q' undeclared (first use in this function)
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