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'{a}{b}{a}'.format (a=' hello' , b=' world', c= 'hello')
#include <stdio.h>void solve() { int a = 3; int res = a++ + ++a + a++ + ++a; printf("%d", res);}int main() { solve(); return 0;
#include<stdio.h> int main(){ int a=90,b=10; printf("%d", a+ b++); return 0; }