Compilare: main.cpp: In function 'int main()': main.cpp:43:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < G[minslct].size();j++){ ~~^~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int minim()': main.cpp:26:12: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] return sol; ^~~ main.cpp: In function 'int main()': main.cpp:42:22: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] viz[minslct] = 1; ~~~~~~~~~~~~~^~~