{"problem":{"name":"LEQ and NEQ","description":{"content":"Given is a sequence of $N$ integers $A_1,A_2,\\ldots,A_N$. Print the number, modulo $998244353$, of sequences of $N$ integers $X_1,X_2,\\ldots,X_N$ satisfying all of the following conditions: *   $1 \\l","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"arc115_e"},"statements":[{"statement_type":"Markdown","content":"Given is a sequence of $N$ integers $A_1,A_2,\\ldots,A_N$. Print the number, modulo $998244353$, of sequences of $N$ integers $X_1,X_2,\\ldots,X_N$ satisfying all of the following conditions:\n\n*   $1 \\leq X_i \\leq A_i$\n*   $X_i \\neq X_{i+1} (1 \\leq i \\leq N-1)$\n\n## Constraints\n\n*   $2 \\leq N \\leq 5 \\times 10^5$\n*   $1 \\leq A_i \\leq 10^9$\n\n## Input\n\nInput is given from Standard Input in the following format:\n\n$N$\n$A_1$ $A_2$ $\\ldots$ $A_N$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"arc115_e","tags":[],"sample_group":[["3\n2 3 2","6\n\nThe following six sequences satisfy all of the conditions.\n\n*   $1,2,1$\n*   $1,3,1$\n*   $1,3,2$\n*   $2,1,2$\n*   $2,3,1$\n*   $2,3,2$"],["10\n158260522 877914575 602436426 24979445 861648772 623690081 433933447 476190629 262703497 211047202","524691026"]],"created_at":"2026-03-03 11:01:14"}}