Borderou de evaluare (job #716735)

Compilare: main.cpp: In function 'int main()': main.cpp:30:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 30 | for(int j=0;j<a.size()-1;j++) | ~^~~~~~~~~~~ main.cpp:32:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 32 | for(int k=0;k<a.size();k++) | ~^~~~~~~~~ main.cpp:49:20: warning: statement has no effect [-Wunused-value] 49 | nr+c*10+c; | ~~~~~~~^~ main.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 85 | for(int j=0;j<a.size()-1;j++) | ~^~~~~~~~~~~ main.cpp:87:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 87 | for(int k=0;k<a.size();k++) | ~^~~~~~~~~