Compilare: main.cpp: In function 'bool ok(int)': main.cpp:62:23: 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:75:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index == noduriSpeciale.size()) ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:79:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSimple.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:91:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSpeciale.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:117:27: 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:170:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graf[i].size(); j++) ~~^~~~~~~~~~~~~~~~ main.cpp:217:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < graf[i].size(); j++) ~~^~~~~~~~~~~~~~~~ main.cpp:251:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSimple.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:253:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < lanturiSimple[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:262:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < lanturiSpeciale.size(); i++) ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:264:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < lanturiSpeciale[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:274:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < lanturiSpeciale[i].lant.size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~