Compilare: main.cpp: In function 'int main()': main.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(i = 0; i < ans.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:12:9: warning: unused variable 'a' [-Wunused-variable] 12 | int a, b, c, i, j; | ^ main.cpp:12:15: warning: unused variable 'c' [-Wunused-variable] 12 | int a, b, c, i, j; | ^ main.cpp:12:21: warning: unused variable 'j' [-Wunused-variable] 12 | int a, b, c, i, j; | ^