#include <stdio.h>
#include <math.h>
int main(void) {
int stud=0,teac=0,i=0;
for(i=0;i<100000;i++){
if(stud!=100){
stud++;
if(teac<20){
teac++;
}
else if(teac==20){
teac=(teac*8)/stud;
}
}
else if(stud>100){
return 0;
}
else if(stud==100){
return 0;
}
}
return 0;
}
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