#include <stdio.h>
int main(void) {
int m,N,I,J,Flag;
Flag=0;
if(m>=2){
for(N=2;N<=m;N++){
I=2;
while(I*I<=N){
J=N%I;
if(J==0){
Flag=1;
}
I=I+1;
}
if(Flag==0){
}
Flag=0;
}
}
return 0;
}
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