Compilare: main.cpp: In member function 'void Fenwick::build(std::vector<long long int>&)': main.cpp:96:37: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 96 | if((i|(i+1))<fw.size()) fw[i|(i+1)] += fw[i]; | ~~~~~~~~~^~~~~~~~~~ main.cpp: In member function 'void Fenwick::update(long long int, long long int)': main.cpp:101:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for(;pos<fw.size();pos|=pos+1) fw[pos] += val; | ~~~^~~~~~~~~~ main.cpp: In member function 'long long int Fenwick::findk(long long int)': main.cpp:119:32: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | while(jump - 1 < fw.size()) | ~~~~~~~~~^~~~~~~~~~~