Compilare: main.cpp: In function 'void sol55(int)': main.cpp:38:22: warning: comparison of integer expressions of different signedness: 'ull' {aka 'long long unsigned int'} and 'int' [-Wsign-compare] 38 | for(ull a=b/2+1;a<b;a++){ | ~^~ main.cpp: In function 'void sol100(int)': main.cpp:59:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | for(int i=0;i<div.size();i++) | ~^~~~~~~~~~~ main.cpp:60:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int j=i+1;j<div.size();j++){ | ~^~~~~~~~~~~