Compilare: main.cpp: In function 'int main()': main.cpp:45:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(canale.size() < k){ ~~~~~~~~~~~~~~^~~ main.cpp:22:9: warning: unused variable 'a' [-Wunused-variable] int a[X]; ^ main.cpp:23:22: warning: unused variable 'aux' [-Wunused-variable] int n,k, cnt = 0,aux; ^~~ main.cpp:33:9: warning: unused variable 'start' [-Wunused-variable] int start = v[1].second; ^~~~~