Compilare: user.cpp: In function ‘int caut(int)’: user.cpp:16:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ x ].a.size(); i++) ^ user.cpp:22:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ x ].a.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:54:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ nx ].a.size(); i++) ^ user.cpp:67:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ nx ].a.size(); i++) ^ user.cpp:74:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ nx ].a.size(); i++) ^ user.cpp:77:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ xx ].a.size(); i++) ^ user.cpp:80:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ nx ].a.size(); i++) ^ user.cpp:86:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[ b[ 0 ] ].a.size(); i++) ^ user.cpp:93:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < b.size(); i++) ^ user.cpp: In function ‘int caut(int)’: user.cpp:21:24: warning: ‘mii’ may be used uninitialized in this function [-Wmaybe-uninitialized] mi = v[ x ].a[ mii ]; ^