Compilare: main.cpp: In function 'int main()': main.cpp:62:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(p1 = 0; p1 < vv.size(); p1++) { | ~~~^~~~~~~~~~~ main.cpp:63:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | for(; p2 < vv.size() && b.count() < n; p2++) { | ~~~^~~~~~~~~~~ main.cpp:63:39: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 63 | for(; p2 < vv.size() && b.count() < n; p2++) { | ~~~~~~~~~~^~~ main.cpp:69:18: warning: comparison of integer expressions of different signedness: 'std::size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 69 | if(b.count() == n) | ~~~~~~~~~~^~~~ main.cpp:82:20: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized] 82 | for(int i = l; i <= r; i++) | ~~^~~~ main.cpp:58:12: warning: 'l' may be used uninitialized in this function [-Wmaybe-uninitialized] 58 | int ans, l, r, p1, p2; | ^