Compilare: user.cpp: In function ‘int main()’: user.cpp:26:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(cost[i][j]+d[i+1][j]<minia) ^ user.cpp:31:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(cost[i][j]+d[i+1][j]<minib) ^ user.cpp:38:55: warning: ‘savea’ may be used uninitialized in this function [-Wmaybe-uninitialized] d[i][j]=(unsigned long long)(cost[i][j]+minib); ^