Compilare: main.cpp: In function 'int Corect_sol::main(int, int, std::vector<int>&)': main.cpp:111:11: warning: unused variable 'j' [-Wunused-variable] 111 | int i,j; | ^ main.cpp: At global scope: main.cpp:146:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 146 | main() | ^~~~ In file included from /usr/include/c++/12.2.1/cassert:44, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:33, from main.cpp:1: main.cpp: In function 'int main()': main.cpp:215:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 215 | assert(sol.size()>=Corect_sol::main(n,m,a)); | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~