Compilare: main.cpp: In function 'int main()': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();++i) ~^~~~~~~~~ main.cpp:31:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int len=1;len<a.size();++len) ~~~^~~~~~~~~ main.cpp:32:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0, j=len;j<a.size();++i, ++j) ~^~~~~~~~~ main.cpp:38:44: warning: suggest parentheses around '-' inside '<<' [-Wparentheses] else if(dp[0][a.size()-1] & (1<<'S'-'A')) fout<<"1\n"; ~~~^~~~