Compilare: user.cpp: In function ‘int main()’: user.cpp:21:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(dp[ upd[i-1][j].first ] > upd[i-1][j].second) ^ user.cpp:25:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i; s[j] and j-i<k; j++){ ^ user.cpp:36:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st==lg[i-1]+1){ ^