Compilare: user.cpp: In function ‘int cond1()’: user.cpp:17:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i>=k1) ^ user.cpp: In function ‘int cond2()’: user.cpp:26:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i>=k1) ^ user.cpp: In function ‘int cond3()’: user.cpp:35:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()+n-i>=k1) ^ user.cpp: In function ‘int main()’: user.cpp:55:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:96:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^ user.cpp:103:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st.size()<k1) ^