View Compilation Error

0_0_19805128_23658.cpp:1:1: error: 'include' does not name a type
 include <cstdio>
 ^
0_0_19805128_23658.cpp: In function 'int main()':
0_0_19805128_23658.cpp:9:28: error: 'scanf' was not declared in this scope
     while( scanf( "%d", &N )!= EOF )
                            ^
0_0_19805128_23658.cpp:9:32: error: 'EOF' was not declared in this scope
     while( scanf( "%d", &N )!= EOF )
                                ^
0_0_19805128_23658.cpp:16:33: error: 'printf' was not declared in this scope
         printf( "%llu\n", ti- 1 );
                                 ^