View Compilation Error

0_0_36748088_15778.c:5:1: error: unknown type name 'using'
 using namespace std;
 ^
0_0_36748088_15778.c:5:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
 using namespace std;
                 ^
0_0_36748088_15778.c:8:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'void'
 inline void vmin(ll v , int x)
        ^
0_0_36748088_15778.c:12:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'void'
 inline void pushup(int x)
        ^
0_0_36748088_15778.c:20:8: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'void'
 inline void pushdown(int x)
        ^