View Compilation Error

0_0_6812083_845.c:1:19: iostream: No such file or directory
0_0_6812083_845.c:2: error: syntax error before "namespace"
0_0_6812083_845.c: In function `main':
0_0_6812083_845.c:33: error: `__int64' undeclared (first use in this function)
0_0_6812083_845.c:33: error: (Each undeclared identifier is reported only once
0_0_6812083_845.c:33: error: for each function it appears in.)
0_0_6812083_845.c:33: error: syntax error before "ans"
0_0_6812083_845.c:40: error: `ans' undeclared (first use in this function)