Compilare: user.cpp: In function ‘void bfs(int)’: user.cpp:45:75: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].first+1<=cost[t[nod][i]].first && pcc!=t[nod][i] && nodd!=t[nod][i]) || (cost[t[nod][i]].first==0 && pcc!=t[nod][i] && nodd!=t[nod][i])) ^ user.cpp:45:142: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].first+1<=cost[t[nod][i]].first && pcc!=t[nod][i] && nodd!=t[nod][i]) || (cost[t[nod][i]].first==0 && pcc!=t[nod][i] && nodd!=t[nod][i])) ^ user.cpp:53:76: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].first+1<=cost[t[nod][i]].second && pcc!=t[nod][i] && income[nod].first!=t[nod][i]) || (cost[t[nod][i]].second==0 && pcc!=t[nod][i] && income[nod].first!=t[nod][i])) ^ user.cpp:53:157: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].first+1<=cost[t[nod][i]].second && pcc!=t[nod][i] && income[nod].first!=t[nod][i]) || (cost[t[nod][i]].second==0 && pcc!=t[nod][i] && income[nod].first!=t[nod][i])) ^ user.cpp:59:77: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].second+1<=cost[t[nod][i]].second && pcc!=t[nod][i] && income[nod].second!=t[nod][i]) || (cost[t[nod][i]].second==0 && pcc!=t[nod][i] && income[nod].second!=t[nod][i])) ^ user.cpp:59:159: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ((cost[nod].second+1<=cost[t[nod][i]].second && pcc!=t[nod][i] && income[nod].second!=t[nod][i]) || (cost[t[nod][i]].second==0 && pcc!=t[nod][i] && income[nod].second!=t[nod][i])) ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:20:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp:25:45: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,DIM,stdin),poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:71:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("statiuni.in","r",stdin); ^ user.cpp:72:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("statiuni.out","w",stdout); ^