Compilare: main.cpp: In function 'int main()': main.cpp:95:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < s.size() ; i++) ~~^~~~~~~~~~ main.cpp:104:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(; i < s.size() ; i++) ~~^~~~~~~~~~ main.cpp:124:25: warning: self-comparison always evaluates to false [-Wtautological-compare] for(; i < i < s.size() ; i++) ~~^~~ main.cpp:124:25: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] main.cpp:143:25: warning: self-comparison always evaluates to false [-Wtautological-compare] for(; i < i < s.size() ; i++) ~~^~~ main.cpp:143:25: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] main.cpp:149:25: warning: self-comparison always evaluates to false [-Wtautological-compare] for(; i < i < s.size() ; i++) ~~^~~ main.cpp:149:25: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses] main.cpp:159:21: warning: unused variable 'ending' [-Wunused-variable] int ending = aux -> second; ^~~~~~ main.cpp:72:9: warning: unused variable 'i' [-Wunused-variable] int i,j; ^ main.cpp:72:11: warning: unused variable 'j' [-Wunused-variable] int i,j; ^