Compilare: user.cpp: In function ‘int main()’: user.cpp:37:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( j = 0; j <= a[i].size(); ++j) ^ user.cpp:38:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( k = j + 1; k < a[i].size(); ++k){ ^ user.cpp:63:18: warning: ‘sub2’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( sub2 & 1 ) ^ user.cpp:53:18: warning: ‘sub1’ may be used uninitialized in this function [-Wmaybe-uninitialized] if( sub1 & 1 ) ^ user.cpp:49:38: warning: ‘max’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf( g, "%d %d\n", sol, max ); ^