Compilare: main.cpp: In function 'int main()': main.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:104:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 104 | while (0 < left && right < freq.size() - 1 && freq[left - 1].val == freq[right + 1].val && freq[left - 1].length + freq[right + 1].length >= 3) | ~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:109:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for(int i = 0; i < freq.size()-1; i++) | ~~^~~~~~~~~~~~~~~ main.cpp:123:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 123 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~ main.cpp:128:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<sequence>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 128 | for (int i = 0; i < freq.size(); i++) | ~~^~~~~~~~~~~~~