Compilare: main.cpp: In function 'bool ok(int)': main.cpp:73:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < grafNoduriSpeciale[nod].size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void back(int)': main.cpp:86:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index == noduriSpeciale.size()) ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:90:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSimple.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:102:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSpeciale.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:128:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < noduriSpeciale.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:205:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < noduriCiclu.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:214:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < noduriCiclu.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~ main.cpp:230:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graf[i].size(); j++) ~~^~~~~~~~~~~~~~~~ main.cpp:289:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graf[i].size(); j++) ~~^~~~~~~~~~~~~~~~ main.cpp:325:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSimple.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:329:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < lanturiSimple[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:338:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSpeciale.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:342:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < lanturiSpeciale[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:352:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < lanturiSpeciale[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~