#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"<<" "; continue; case(2): cout<<"2"<<" "; continue; case(3): cout<<"3"<<" "; continue; case(4): cout<<"4"<<" "; continue; case(5): cout<<"5"<<" "; continue; case(6): cout<<"6"<<" "; continue; case(7): cout<<"7"<<" "; continue; case(8): cout<<"8"<<" "; continue; case(9): cout<<"9"<<" "; continue; } } } return 0; }