Compilare: main.cpp: In function 'int main()': main.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < og.length(); i ++) ~~^~~~~~~~~~~~~ main.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < st.length(); i ++) ~~^~~~~~~~~~~~~ main.cpp:58:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 1; i-j >= 0 && i+j < st.length() && st[i-j] == st[i+j]; j ++) {} ~~~~^~~~~~~~~~~~~ main.cpp:68:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 1; 2*i-mx-j >= 0 && mx+j < st.length() && st[2*i-mx-j] == st[mx+j]; j ++) {} ~~~~~^~~~~~~~~~~~~ main.cpp:74:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < st.length(); i ++) ~~^~~~~~~~~~~~~