foo.cc: In function ‘int main()’:
foo.cc:16:30: warning: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Wsign-compare]
   16 |                 for(int i=0;i<strlen(s);i++){
      |                             ~^~~~~~~~~~

正在同步测试数据，请稍后