Compilare: main.cpp: In function 'int main()': main.cpp:17:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare] 17 | for (size_t i = 0; i < n; i++) | ~~^~~ main.cpp:20:15: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare] 20 | if (i >= k) | ~~^~~~ main.cpp:36:44: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 36 | if (!V.empty() and V.back().second == i - k) | ~~~~~~~~~~~~~~~~^~~~~~~~ main.cpp:46:44: warning: comparison of integer expressions of different signedness: 'int' and 'long long unsigned int' [-Wsign-compare] 46 | if (!v.empty() and v.back().second == i - k) | ~~~~~~~~~~~~~~~~^~~~~~~~