Compilare: user.cpp: In function ‘int cond1()’: user.cpp:18:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i>=k1) ^ user.cpp: In function ‘int cond2()’: user.cpp:27:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i>=k1) ^ user.cpp: In function ‘int main()’: user.cpp:48:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:91:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:107:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^