Compilare: main.cpp: In function 'bool Find(int, int)': main.cpp:24:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i = 0; i < v[x].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp: At global scope: main.cpp:32:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 32 | main() | ^~~~ main.cpp: In function 'int main()': main.cpp:56:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for(int i = 0; i < v[u].size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:66:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(int i = 0; i < v[uv].size(); i++) | ~~^~~~~~~~~~~~~~