Compilare: main.cpp: In function 'int main()': main.cpp:49:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 49 | if(sol.size()!=n+1) {fout<<0;return 0;} | ~~~~~~~~~~^~~~~ main.cpp:38:13: warning: unused variable 'x' [-Wunused-variable] 38 | int i,n,x,y,ct=0,start; | ^ main.cpp:38:15: warning: unused variable 'y' [-Wunused-variable] 38 | int i,n,x,y,ct=0,start; | ^