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1.2#include\{
int i=1,sum=1; do { i++; if(i%2==0)
sum=sum-i; else sum=sum+i; }
while(i<100); cout< 19 int i,sum; for(i=1,sum=0;i<=100;i++) {if(i%2==0) sum=sum-i; else sum=sum+i;} cout< #include\{ int a; cout<<\cin>>a; while(a10!=0) {