#include <stdio.h>
int main(void)
{
    float before = 0;
    float pos = 703;
    int y = 123;
 
    for(int c=0;c<1000;c++){
        printf("before:%.30f\n", before);
        pos = 650 - (704 - y)*(-1)*(((before * (-1)) + 649) / 649);
 
        for(int i = 0; i < 200; i++){
                for(int j = 5; j >= 0; j--){
                    pos -= 26;
                }
        }
        before = pos;
    }
}