Compilare: main.cpp: In function 'void solve()': main.cpp:16:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<a.size();i++){ ~^~~~~~~~~ main.cpp:22:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<b.size();i++){ ~^~~~~~~~~ main.cpp:29:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<c.size();i++){ ~^~~~~~~~~ main.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] rest[i]-=(i==c.size()-1); ~^~~~~~~~~~~~ main.cpp:42:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<a.size() && a[i]=='*'){ ~^~~~~~~~~ main.cpp:43:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] a[i]='9'-min(9-(i==a.size()-1),transp); ~^~~~~~~~~~~~ main.cpp:46:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i<b.size() && b[i]=='*'){ ~^~~~~~~~~ main.cpp:47:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] b[i]='9'-min(9-(i==b.size()-1),transp); ~^~~~~~~~~~~~ main.cpp:51:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] c[i]='0'+(i==c.size()-1)+min(transp,9-(i==c.size()-1)); ~^~~~~~~~~~~~ main.cpp:51:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] c[i]='0'+(i==c.size()-1)+min(transp,9-(i==c.size()-1)); ~^~~~~~~~~~~~ main.cpp:52:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] transp-=(c[i]-'0'-(i==c.size()-1)); ~^~~~~~~~~~~~