Borderou de evaluare (job #819678)

Compilare: main.cpp: In function 'std::string prod(std::string, std::string)': main.cpp:40:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 40 | while(i<r.size() && r[i]==0) ++i; | ~^~~~~~~~~ main.cpp:41:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 41 | if(i==r.size()) return "0"; | ~^~~~~~~~~~ main.cpp:42:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'unsigned int'} [-Wsign-compare] 42 | for(; i<r.size(); ++i) p+=(r[i]+'0'); | ~^~~~~~~~~