expresie.cpp: In function `void citire()': expresie.cpp:11: warning: comparison between signed and unsigned integer expressions expresie.cpp: In function `void solve_f3()': expresie.cpp:16: warning: comparison between signed and unsigned integer expressions expresie.cpp: In function `void solve_f2()': expresie.cpp:24: warning: comparison between signed and unsigned integer expressions expresie.cpp:26: warning: comparison between signed and unsigned integer expressions