#include<bits/stdc++.h> using namespace std; int main(){ int a = 0,b = 10,c; while(a<100){ a++; if(a%3 == 0){ c = a%10; switch(c){ case(1): cout<<"1"<<" "; break; case(2): cout<<"2"<<" "; break; case(3): cout<<"3"<<" "; break; case(4): cout<<"4"<<" "; break; case(5): cout<<"5"<<" "; break; case(6): cout<<"6"<<" "; break; case(7): cout<<"7"<<" "; break; case(8): cout<<"8"<<" "; break; case(9): cout<<"9"<<" "; break; } } } return 0; }