foo.cc: In function 'int main()':
foo.cc:56:12: warning: unused variable 'lens' [-Wunused-variable]
   56 |   int lent,lens=0,num=0,m;now=1;point=0;
      |            ^~~~
foo.cc:57:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   57 |   scanf("%s",t+1);lent=strlen(t+1);
      |   ~~~~~^~~~~~~~~~

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