#include <stdio.h>
int main(){
    int a,sum;  //????
    a=1,sum=0;  //???
    while(a<=100){  do{  // while????a<=100??????
        sum+=a;  //sum=sum+a
        a++;  //a+1
    }
}while(a<=100);  //????????
    printf("sum=%d",sum);  //??sum
    return 0;
}