{"raw_statement":[{"iden":"problem statement","content":"Naohiro had $N+1$ consecutive integers, one of each, but he lost one of them.\nThe remaining $N$ integers are given in arbitrary order as $A_1,\\ldots,A_N$. Find the lost integer.\nThe given input guarantees that the lost integer is uniquely determined."},{"iden":"constraints","content":"*   $2 \\leq N \\leq 100$\n*   $1 \\leq A_i \\leq 1000$\n*   All input values are integers.\n*   The lost integer is uniquely determined."},{"iden":"input","content":"The input is given from Standard Input in the following format:\n\n$N$\n$A_1$ $A_2$ $\\ldots$ $A_N$"},{"iden":"sample input 1","content":"3\n2 3 5"},{"iden":"sample output 1","content":"4\n\nNaohiro originally had four integers, $2,3,4,5$, then lost $4$, and now has $2,3,5$.\nPrint the lost integer, $4$."},{"iden":"sample input 2","content":"8\n3 1 4 5 9 2 6 8"},{"iden":"sample output 2","content":"7"},{"iden":"sample input 3","content":"16\n152 153 154 147 148 149 158 159 160 155 156 157 144 145 146 150"},{"iden":"sample output 3","content":"151"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}