From be7e712cd8605f045fabba10c53dbb46c186ec58 Mon Sep 17 00:00:00 2001 From: crupest Date: Wed, 15 Jul 2020 17:01:16 +0800 Subject: import(solutions): Add problem 7 . --- works/solutions/cpp/7.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 works/solutions/cpp/7.cpp (limited to 'works/solutions/cpp/7.cpp') diff --git a/works/solutions/cpp/7.cpp b/works/solutions/cpp/7.cpp new file mode 100644 index 0000000..a1a05c1 --- /dev/null +++ b/works/solutions/cpp/7.cpp @@ -0,0 +1,18 @@ +class Solution +{ +public: + int reverse(int x) + { + int result = 0; + while (x != 0) + { + int digit = x % 10; + x /= 10; + if (__builtin_smul_overflow(result, 10, &result)) + return 0; + if (__builtin_sadd_overflow(result, digit, &result)) + return 0; + } + return result; + } +}; -- cgit v1.2.3