Compilare: main.cpp: In function 'long long int solve(std::__cxx11::string)': main.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i ++) { ~~^~~~~~~~~~ main.cpp:31:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < v.size(); i ++) { ~~^~~~~~~~~~ main.cpp:34:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i + p[i] < v.size() && i - p[i] >= 0 && v[i + p[i]].first == v[i - p[i]].first) ~~~~~~~~~^~~~~~~~~~ main.cpp:63:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < palindromes.size() && palindromes[pos].first <= l) { ~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'long long int brute()': main.cpp:91:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i ++) { ~~^~~~~~~~~~ main.cpp:92:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j < s.size(); j ++) { ~~^~~~~~~~~~ main.cpp:94:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l = j + 1; l < s.size(); l ++) ~~^~~~~~~~~~