#includeusing namespace std; int main() { int ans = 0; for(int i=1;i<=2020;i++){ int temp = i; while(temp){ if(temp%10 == 2){ ans++; break; } temp/=10; } } cout< Answer 563

#includeusing namespace std; int main() { int ans = 0; for(int i=1;i<=2020;i++){ int temp = i; while(temp){ if(temp%10 == 2){ ans++; break; } temp/=10; } } cout< Answer 563