View Compilation Error

761958_0_0_17264.c:1:19: iostream: No such file or directory
761958_0_0_17264.c:2:17: string: No such file or directory
761958_0_0_17264.c:3:16: cmath: No such file or directory
761958_0_0_17264.c:4: error: syntax error before "namespace"
761958_0_0_17264.c:7: error: syntax error before "n"
761958_0_0_17264.c:21: error: syntax error before "__int64"
761958_0_0_17264.c: In function `dfs':
761958_0_0_17264.c:23: error: `x' undeclared (first use in this function)
761958_0_0_17264.c:23: error: (Each undeclared identifier is reported only once
761958_0_0_17264.c:23: error: for each function it appears in.)
761958_0_0_17264.c:30: error: `__int64' undeclared (first use in this function)
761958_0_0_17264.c:30: error: syntax error before "tem"
761958_0_0_17264.c:33: error: `num' undeclared (first use in this function)
761958_0_0_17264.c:33: error: `tem' undeclared (first use in this function)