0_0_2110603_10737.c:1:18: cstdio: No such file or directory 0_0_2110603_10737.c:2:17: cmath: No such file or directory 0_0_2110603_10737.c:3:21: algorithm: No such file or directory 0_0_2110603_10737.c:5: error: syntax error before "namespace"