View Compilation Error

0_0_4403994_673.c:3:21: algorithm: No such file or directory
0_0_4403994_673.c:4: error: syntax error before "namespace"
0_0_4403994_673.c: In function `Down':
0_0_4403994_673.c:23: error: syntax error before '/' token
0_0_4403994_673.c: In function `build':
0_0_4403994_673.c:44: error: syntax error before '/' token
0_0_4403994_673.c: In function `Update':
0_0_4403994_673.c:55: error: syntax error before '/' token
0_0_4403994_673.c:58: error: syntax error before '/' token