Compilare: main.cpp: In function 'int bin_search(std::pair<int, int>)': main.cpp:16:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_row.size() && by_row[pos + pas].first < x.second) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:23:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_row.size() && by_row[pos + pas].first <= x.second) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:29:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_row.size() && pos + pas <= pos1 && by_row[pos + pas].second <= x.first) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int bin_search_col(std::pair<int, int>)': main.cpp:39:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_col.size() && by_col[pos + pas].first < x.second) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:46:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_col.size() && by_col[pos + pas].first <= x.second) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:52:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos + pas < by_col.size() && pos + pas <= pos1 && by_col[pos + pas].second <= x.first) { ~~~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:80:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < by_col.size() - 1; i++) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:84:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (bin == by_row.size() - 1) continue; ~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp:89:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (bin2 == by_col.size() - 1) continue; ~~~~~^~~~~~~~~~~~~~~~~~~~