Compilare: main.cpp: In function 'll getVal(std::__cxx11::string)': main.cpp:119:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++){ ~~^~~~~~~~~~ main.cpp: In function 'll getMin(std::__cxx11::string, int)': main.cpp:166:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l1 = 0; l1 <= prefix.size(); l1++){ ~~~^~~~~~~~~~~~~~~~ main.cpp:167:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l2 = 0; l2 <= suffix.size(); l2++){ ~~~^~~~~~~~~~~~~~~~ main.cpp:168:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l1 + l2 > suffix.size()){ ~~~~~~~~^~~~~~~~~~~~~~~ main.cpp:175:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l1 = 0; l1 <= prefix2.size(); l1++){ ~~~^~~~~~~~~~~~~~~~~ main.cpp:176:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int l2 = 0; l2 <= suffix.size(); l2++){ ~~~^~~~~~~~~~~~~~~~ main.cpp:177:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(l1 + l2 > suffix.size()){ ~~~~~~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:220:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i + 1 < s.size(); i++){ ~~~~~~^~~~~~~~~~ main.cpp:226:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < s.size(); i++){ ~~^~~~~~~~~~ main.cpp:228:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j < s.size(); j++){ ~~^~~~~~~~~~