Compilare: main.cpp: In function 'std::vector<int> mergesort(int, int)': main.cpp:30:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(pozx<x.size() || pozy<y.size()) | ~~~~^~~~~~~~~ main.cpp:30:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | while(pozx<x.size() || pozy<y.size()) | ~~~~^~~~~~~~~ main.cpp:32:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if(pozx<x.size() && (pozy==y.size() || isfirst(x[pozx],y[pozy]))) | ~~~~^~~~~~~~~ main.cpp:32:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if(pozx<x.size() && (pozy==y.size() || isfirst(x[pozx],y[pozy]))) | ~~~~^~~~~~~~~~