le (!isprime (j?))\r\rcout << "max prime: “ 2 j+1 2 endl;\rreturn 0;\r}\rint isprime(int x) {\rfor (int i=2; i<x; i++)\rif (x%i==0)\rreturn 0;.\rreturn 1;\r)\r91.=>Y]PPe\r$ = 3 + 33 + 333 + ?+ 533...3\r.\rwTn p?i?pn ?P?\r???P? h3QLn\r¡¢m?£¤\r¥=?pm?¦§L[?p?\rhe int\rf (int i); , ¨Z©ªLL«¬Q\rftinclude <iostream>\rusing namespace std;\rint main (void) {\rint f (int i);\rint n, sum=0;\rcout << input n = cin n;\rfor (int i=l; i<=n; i++).\rsum += f (i);\rcout << "sum = " << sum << endl;\rreturn 0;\r)\rint f (int i) {\rint val=0;\rfor (int j=0; j<i; j++)\rval = val*10 + 3;\rreturn val;
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