Hello World!

Hello World !

$$E = mc^2$$

            
            %%{init: {"theme":"dark", "themeVariables": {  "edgeLabelBackground": "transparent", "primaryBorder": "transparent", "secondaryBorder": "transparent", "tertiaryBorder": "transparent", "primaryColor":"#fff", "edgeLabelBackground":"#222", "lineColor":"#fff"}}}%%
graph TD
    A(Start) --> B[Process]
    B --> C(End)
          

#include <stdio.h>

int main(){
    printf("hello world\n");
    return 0;
}