Compilare: main.cpp: In function 'long long int f(std::vector<long long int>)': main.cpp:68:13: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 68 | while (p < Prev.size() && Prev[p].ff < i) { | ~~^~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:83:2: warning: left operand of comma operator has no effect [-Wunused-value] 83 | n, k; cin >> n >> k; | ^ main.cpp:83:6: warning: right operand of comma operator has no effect [-Wunused-value] 83 | n, k; cin >> n >> k; | ^