Compilare: main.cpp: In function 'int main()': main.cpp:129:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | for (i=0; i<s.size(); i++){ | ~^~~~~~~~~ main.cpp:149:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 149 | if (ma[i][j]==s.size()+1) | ~~~~~~~~^~~~~~~~~~~~ main.cpp:102:29: warning: unused variable 'lg' [-Wunused-variable] 102 | int n,m,i,j,p,q,a,li,ci,lg,ok; | ^~ main.cpp:142:23: warning: 'ci' may be used uninitialized [-Wmaybe-uninitialized] 142 | ma[li][ci]=-1; | ~~~~~~~~~~^~~ main.cpp:102:26: note: 'ci' was declared here 102 | int n,m,i,j,p,q,a,li,ci,lg,ok; | ^~ main.cpp:142:23: warning: 'li' may be used uninitialized [-Wmaybe-uninitialized] 142 | ma[li][ci]=-1; | ~~~~~~~~~~^~~ main.cpp:102:23: note: 'li' was declared here 102 | int n,m,i,j,p,q,a,li,ci,lg,ok; | ^~