Compilare: main.cpp: In function 'int cauta(int, int)': main.cpp:61:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < v[x].size() ; i ++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int unionstr(int, int)': main.cpp:127:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ main.cpp: In function 'void afisare(int, int)': main.cpp:135:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0 ; i < G[x].size() ; i ++) ~~^~~~~~~~~~~~~ main.cpp:141:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = G[x][i].poz ; j < v[y].length() ; j ++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:203:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = 0 ; k < G[j].size() ; k ++) ~~^~~~~~~~~~~~~ main.cpp:151:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("adn.in" , "r" , stdin); ^ main.cpp:153:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("adn.out" , "w" , stdout); ^ main.cpp:157:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n" , &n); ^