Compilare: main.cpp: In function 'void citire()': main.cpp:17:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ~^~~ main.cpp:25:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1; j<=n; j++) ~^~~ main.cpp: In function 'void reun()': main.cpp:67:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; ++i) ~^~~ main.cpp:70:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(sum<costmin) ~~~^~~~~~~~ main.cpp: In function 'void afisVec(int, long long int)': main.cpp:88:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < a.size (); ++i) { ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:97:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ~^~~ main.cpp:100:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ~^~~