Compilare: main.cpp: In function 'bool ok(int)': main.cpp:27:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip[k].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip[1].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:31:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < tip[2].size(); j++) ~~^~~~~~~~~~~~~~~ main.cpp:36:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < tip[1].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:37:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < tip[1].size(); j++) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:9: warning: unused variable 'st' [-Wunused-variable] int st = 0, dr = 5000; ^~