0_0_3357159_28255.c:3:18: cstdio: No such file or directory 0_0_3357159_28255.c:4:21: algorithm: No such file or directory 0_0_3357159_28255.c:5:19: cstring: No such file or directory 0_0_3357159_28255.c:6: error: syntax error before "namespace"