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- /*This Code finds the sum of all multiples of 3 or 5 for a given range of numbers. For example for n=10, no. of the multiple of 3 or 5 below 10 are 3,5,6,9 & their sum is 23.*/
- int main(){
- int t; //Number of test cases
- cin >> t;
- for(int a0 = 0; a0 < t; a0++){
- int sum=0;
- int n; //number till which we want to calculate sum.
- cin >> n; //eg. 10 or 100
- for( int i=0;i<n;i++){
- if(i%3==0||i%5==0){
- sum+=i; //3,5,6 & 9 are added here
- }
- }
- cout<<sum<<endl; //SUM OF ALL MULTIPLES OF 3 OR 5 RETURNED HERE.
- }
- return 0;
- }
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