题解 | #字符个数统计#
字符个数统计
https://www.nowcoder.com/practice/eb94f6a5b2ba49c6ac72d40b5ce95f50
#include <iostream> using namespace std; int main() { int bucket[128]{}; char c{}; int count{}; while ((c = getchar()) != '\n') { if (!bucket[c]) { ++count; ++bucket[c]; } } printf("%d", count); } // 64 位输出请用 printf("%lld")