Compilare: main.cpp: In function 'void Do_Case_1()': main.cpp:49:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip_1.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:80:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip_2.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp: In function 'bool check(int)': main.cpp:136:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip_1.size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp:137:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < tip_2.size(); ++j) ~~^~~~~~~~~~~~~~ main.cpp:140:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i2 = 0; i2 < tip_1.size(); ++i2) ~~~^~~~~~~~~~~~~~ main.cpp:142:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j2 = 0; j2 < tip_2.size(); ++j2) ~~~^~~~~~~~~~~~~~