Compilare: main.cpp: In function 'int main()': main.cpp:19:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int i=0;i<strlen(a);i++) | ~^~~~~~~~~~ main.cpp:24:20: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 24 | while(i<strlen(a) && isnum(a[i])) | ~^~~~~~~~~~ main.cpp:85:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i=t;i<v.size();i++) | ~^~~~~~~~~