expgorl.cpp: In function 'void check(int)':
expgorl.cpp:28:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
28 | for(int i = 0;i < s.size(); i++){
| ~~^~~~~~~~~~
expgorl.cpp: At global scope:
expgorl.cpp:45:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
45 | main()
| ^
expgorl.cpp: In function 'int main()':
expgorl.cpp:53:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
53 | for(int i = 0;i < s.size(); i++){
| ~~^~~~~~~~~~
expgorl.cpp:48:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
48 | scanf("%d", &k);
| ~~~~~^~~~~~~~~~