820056_0_0_28137.c:5: error: syntax error before "mat"
820056_0_0_28137.c:6: error: syntax error before "v"
820056_0_0_28137.c: In function `dfs':
820056_0_0_28137.c:10: error: `true' undeclared (first use in this function)
820056_0_0_28137.c:10: error: (Each undeclared identifier is reported only once
820056_0_0_28137.c:10: error: for each function it appears in.)
820056_0_0_28137.c:11: error: 'for' loop initial declaration used outside C99 mode
820056_0_0_28137.c: In function `main':
820056_0_0_28137.c:22: error: `false' undeclared (first use in this function)
820056_0_0_28137.c:27: error: `true' undeclared (first use in this function)
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