Compilare: main.cpp: In function 'void calc_for_cnt_ab(int)': main.cpp:42:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (have_to_take_friends_a > vec_a.size()) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:45:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (have_to_take_friends_b > vec_b.size()) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:66:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_a = idx_a < vec_a.size() ? vec_a[idx_a] : INF; ~~~~~~^~~~~~~~~~~~~~ main.cpp:67:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_b = idx_b < vec_b.size() ? vec_b[idx_b] : INF; ~~~~~~^~~~~~~~~~~~~~ main.cpp:68:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_i = idx_i < vec_i.size() ? vec_i[idx_i] : INF; ~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:129:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < vec_ab.size(); ++i) ~~^~~~~~~~~~~~~~~ main.cpp:134:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < vec_a.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:139:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < vec_b.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:144:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < vec_i.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:192:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (have_to_take_friends_a > vec_a.size()) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:195:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (have_to_take_friends_b > vec_b.size()) ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~ main.cpp:233:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_a = idx_a < vec_a.size() ? vec_a[idx_a] : INF; ~~~~~~^~~~~~~~~~~~~~ main.cpp:234:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_b = idx_b < vec_b.size() ? vec_b[idx_b] : INF; ~~~~~~^~~~~~~~~~~~~~ main.cpp:235:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] int64_t value_i = idx_i < vec_i.size() ? vec_i[idx_i] : INF; ~~~~~~^~~~~~~~~~~~~~