View Compilation Error

0_0_8740107_8912.c:1:17: cstdio: No such file or directory
0_0_8740107_8912.c:2:16: cmath: No such file or directory
0_0_8740107_8912.c:3:18: cstring: No such file or directory
0_0_8740107_8912.c:5: error: syntax error before "ans"
0_0_8740107_8912.c: In function `dfs':
0_0_8740107_8912.c:12: error: `true' undeclared (first use in this function)
0_0_8740107_8912.c:12: error: (Each undeclared identifier is reported only once
0_0_8740107_8912.c:12: error: for each function it appears in.)
0_0_8740107_8912.c:16: error: 'for' loop initial declaration used outside C99 mode
0_0_8740107_8912.c: In function `main':
0_0_8740107_8912.c:41: error: 'for' loop initial declaration used outside C99 mode
0_0_8740107_8912.c:43: error: 'for' loop initial declaration used outside C99 mode
0_0_8740107_8912.c:53: error: `false' undeclared (first use in this function)