foo.cc: In function 'int main()':
foo.cc:65:42: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
 printf("%I64d", dist(str, g[length][sum]));
                 ~~~~~~~~~~~~~~~~~~~~~~~~~^
foo.cc:25:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%d", &length);
 ~~~~~^~~~~~~~~~~~~~~
foo.cc:26:6: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%s", str);
 ~~~~~^~~~~~~~~~~

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