#include <stdio.h>
int main() {
int x, s=0, a=0, b=0, c=0, d=0;
for(int i=0;i<20;i++){
if(x>=90) s++;
else if(x>=80) a++;
else if(x>=70) b++;
else if(x>=60) c++;
else d++;
}
printf("S=%d A=%d B=%d C=%d D=%d\n", s
, a
, b
, c
, d
); return 0;
}
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